accessibility menu, dialog, popup

UserName

Aminosyror

Organiska föreningar som består av en central kolatom, en karboxylgrupp, en aminogrupp och en unik sidokedja; prekursorer till andra molekyler inklusive proteiner, hormoner och neurotransmittorer.
Molekylvikt (g/mol) 
  • (3)
  • (33)
  • (1)
  • (5)
  • (3)
  • (5)
  • (6)
  • (2)
  • (2)
  • (3)
  • (6)
  • (3)
  • (2)
  • (3)
  • (3)
  • (2)
  • (3)
  • (2)
  • (1)
  • (3)
  • (3)
Kvantitet 
  • (10)
  • (4)
  • (18)
  • (4)
  • (2)
  • (1)
  • (1)
  • (1)
  • (16)
  • (5)
  • (3)
  • (1)
  • (17)
  • (2)
  • (1)
  • (4)
  • (3)
  • (1)
Procent renhet 
  • (12)
  • (7)
  • (1)
  • (3)
  • (3)
  • (2)
  • (20)
  • (4)
  • (1)
  • (15)
  • (4)
Kvalitet 
  • (7)
  • (3)
  • (2)
  • (7)
Keyword Search: methionine Rensa alla val

Filtrerade sökresultat

Produkter från vissa av våra leverantörer visas inte i filtrerade sökresultat. Vänligen Rensa alla filter för att se dessa produkter.

Begränsa resultat

Välj filter

Klart

Keyword Search

methionine

Begränsa resultat

Begränsa resultat

Inga resultat hittades inom denna kategori. Försök att ta bort några valda filter och försök igen.

Kategori

Varumärken

  • (1)
  • (1)
  • (1)
  • (2)
  • (8)
  • (7)
  • (2)
  • (14)
  • (59)

specialprogram

  • (2)
  • (7)

Molekylvikt (g/mol)

  • (3)
  • (33)
  • (1)
  • (5)
  • (3)
  • (5)
  • (6)
  • (2)
  • (2)
  • (3)
  • (6)
  • (3)
  • (2)
  • (3)
  • (3)
  • (2)
  • (3)
  • (2)
  • (1)
  • (3)
  • (3)

Kvantitet

  • (10)
  • (4)
  • (18)
  • (4)
  • (2)
  • (1)
  • (1)
  • (1)
  • (16)
  • (5)
  • (3)
  • (1)
  • (17)
  • (2)
  • (1)
  • (4)
  • (3)
  • (1)

Procent renhet

  • (12)
  • (7)
  • (1)
  • (3)
  • (3)
  • (2)
  • (20)
  • (4)
  • (1)
  • (15)
  • (4)

Kvalitet

  • (7)
  • (3)
  • (2)
  • (7)
1 – 15 av 38 Resultat
1

Thermo Scientific Chemicals L-metionin, 98+%

CAS: 63-68-3 Molekylformel: C5H11NO2S Molekylvikt (g/mol): 149.21 MDL-nummer: MFCD00063097 MFCD00801344 InChI-nyckel: FFEARJCKVFRZRR-BYPYZUCNSA-N Synonym: l-methionine,methionine,h-met-oh,s-2-amino-4-methylthio butanoic acid,cymethion,l---methionine,liquimeth,s-methionine,l-methioninum,methilanin PubChem CID: 6137 ChEBI: CHEBI:16643 LEDER: CSCC[C@H](N)C(O)=O

EDGE
Molekylformel C5H11NO2S
PubChem CID 6137
MDL-nummer MFCD00063097 MFCD00801344
CAS 63-68-3
InChI-nyckel FFEARJCKVFRZRR-BYPYZUCNSA-N
LEDER CSCC[C@H](N)C(O)=O
ChEBI CHEBI:16643
Molekylvikt (g/mol) 149.21
Synonym l-methionine,methionine,h-met-oh,s-2-amino-4-methylthio butanoic acid,cymethion,l---methionine,liquimeth,s-methionine,l-methioninum,methilanin
2

Thermo Scientific Chemicals DL-metionin, 99+%

CAS: 59-51-8 Molekylformel: C5H11NO2S Molekylvikt (g/mol): 149.21 MDL-nummer: MFCD00063096 InChI-nyckel: FFEARJCKVFRZRR-UHFFFAOYNA-N Synonym: dl-methionine,methionine,racemethionine,acimetion,banthionine,cynaron,lobamine,meonine,mertionin,metione PubChem CID: 876 ChEBI: CHEBI:16811 LEDER: CSCCC(N)C(O)=O

EDGE
Molekylformel C5H11NO2S
PubChem CID 876
MDL-nummer MFCD00063096
CAS 59-51-8
InChI-nyckel FFEARJCKVFRZRR-UHFFFAOYNA-N
LEDER CSCCC(N)C(O)=O
ChEBI CHEBI:16811
Molekylvikt (g/mol) 149.21
Synonym dl-methionine,methionine,racemethionine,acimetion,banthionine,cynaron,lobamine,meonine,mertionin,metione
3

Thermo Scientific Chemicals L-metioninsulfoxid

CAS: 3226-65-1 Molekylformel: C5H11NO3S Molekylvikt (g/mol): 165.21 MDL-nummer: MFCD00063093 InChI-nyckel: QEFRNWWLZKMPFJ-YGVKFDHGSA-N Synonym: l-methionine sulfoxide,h-met o-oh,methionine s-oxide,methionine sulfoxide,2s-2-amino-4-methylsulfinyl butanoic acid,l-methionine s-oxide,2s-2-amino-4-methylsulfinylbutanoic acid,l-2-amino-4-methylsulfinyl butanoic acid,l-methionine-dl-sulfoxide,2s-2-azanyl-4-methylsulfinyl-butanoic acid PubChem CID: 158980 ChEBI: CHEBI:17016 IUPAC-namn: (2S)-2-amino-4-metylsulfinylbutansyra LEDER: CS(=O)CC[C@H](N)C(O)=O

Molekylformel C5H11NO3S
PubChem CID 158980
MDL-nummer MFCD00063093
IUPAC-namn (2S)-2-amino-4-metylsulfinylbutansyra
CAS 3226-65-1
InChI-nyckel QEFRNWWLZKMPFJ-YGVKFDHGSA-N
LEDER CS(=O)CC[C@H](N)C(O)=O
ChEBI CHEBI:17016
Molekylvikt (g/mol) 165.21
Synonym l-methionine sulfoxide,h-met o-oh,methionine s-oxide,methionine sulfoxide,2s-2-amino-4-methylsulfinyl butanoic acid,l-methionine s-oxide,2s-2-amino-4-methylsulfinylbutanoic acid,l-2-amino-4-methylsulfinyl butanoic acid,l-methionine-dl-sulfoxide,2s-2-azanyl-4-methylsulfinyl-butanoic acid
4

Thermo Scientific Chemicals L-metionin, 98+%

CAS: 63-68-3 Molekylformel: C5H11NO2S Molekylvikt (g/mol): 149.21 MDL-nummer: MFCD00063097 MFCD00801344 InChI-nyckel: FFEARJCKVFRZRR-BYPYZUCNSA-N Synonym: l-methionine,methionine,h-met-oh,s-2-amino-4-methylthio butanoic acid,cymethion,l---methionine,liquimeth,s-methionine,l-methioninum,methilanin PubChem CID: 6137 ChEBI: CHEBI:16643 IUPAC-namn: (2S)-2-amino-4-metylsulfanylbutansyra LEDER: CSCC[C@H](N)C(O)=O

Molekylformel C5H11NO2S
PubChem CID 6137
MDL-nummer MFCD00063097 MFCD00801344
IUPAC-namn (2S)-2-amino-4-metylsulfanylbutansyra
CAS 63-68-3
InChI-nyckel FFEARJCKVFRZRR-BYPYZUCNSA-N
LEDER CSCC[C@H](N)C(O)=O
ChEBI CHEBI:16643
Molekylvikt (g/mol) 149.21
Synonym l-methionine,methionine,h-met-oh,s-2-amino-4-methylthio butanoic acid,cymethion,l---methionine,liquimeth,s-methionine,l-methioninum,methilanin
5

N-Formyl-L-methionine, 95%

CAS: 4289-98-9 Molekylformel: C6H11NO3S Molekylvikt (g/mol): 177.22 MDL-nummer: MFCD00021033 InChI-nyckel: PYUSHNKNPOHWEZ-YFKPBYRVSA-N Synonym: n-formyl-l-methionine,n-formylmethionine,for-met-oh,s-2-formamido-4-methylthio butanoic acid,formyl-l-methionine,formylmethionine,l-methionine, n-formyl,unii-ps9357b4xh,n-formyl methionine PubChem CID: 439750 ChEBI: CHEBI:16552 IUPAC-namn: (2S)-2-formamido-4-metylsulfanylbutansyra LEDER: CSCC[C@H](NC=O)C(O)=O

Molekylformel C6H11NO3S
PubChem CID 439750
MDL-nummer MFCD00021033
IUPAC-namn (2S)-2-formamido-4-metylsulfanylbutansyra
CAS 4289-98-9
InChI-nyckel PYUSHNKNPOHWEZ-YFKPBYRVSA-N
LEDER CSCC[C@H](NC=O)C(O)=O
ChEBI CHEBI:16552
Molekylvikt (g/mol) 177.22
Synonym n-formyl-l-methionine,n-formylmethionine,for-met-oh,s-2-formamido-4-methylthio butanoic acid,formyl-l-methionine,formylmethionine,l-methionine, n-formyl,unii-ps9357b4xh,n-formyl methionine
6

Thermo Scientific Chemicals D-metionin, 99+ %

CAS: 348-67-4 Molekylformel: C5H11NO2S Molekylvikt (g/mol): 149.21 MDL-nummer: MFCD00002622 InChI-nyckel: FFEARJCKVFRZRR-SCSAIBSYSA-N Synonym: d-methionine,h-d-met-oh,r-methionine,d-methionin,d-metionien,methionine, d,r-2-amino-4-methylthio butanoic acid,2r-2-amino-4-methylsulfanyl butanoic acid,d-2-amino-4-methylthio butyric acid PubChem CID: 84815 ChEBI: CHEBI:16867 LEDER: CSCC[C@@H](N)C(O)=O

Molekylformel C5H11NO2S
PubChem CID 84815
MDL-nummer MFCD00002622
CAS 348-67-4
InChI-nyckel FFEARJCKVFRZRR-SCSAIBSYSA-N
LEDER CSCC[C@@H](N)C(O)=O
ChEBI CHEBI:16867
Molekylvikt (g/mol) 149.21
Synonym d-methionine,h-d-met-oh,r-methionine,d-methionin,d-metionien,methionine, d,r-2-amino-4-methylthio butanoic acid,2r-2-amino-4-methylsulfanyl butanoic acid,d-2-amino-4-methylthio butyric acid
7

Thermo Scientific Chemicals DL-metionin, 99 %

CAS: 59-51-8 Molekylformel: C5H11NO2S Molekylvikt (g/mol): 149.21 MDL-nummer: MFCD00063096 InChI-nyckel: FFEARJCKVFRZRR-UHFFFAOYNA-N Synonym: dl-methionine,methionine,racemethionine,acimetion,banthionine,cynaron,lobamine,meonine,mertionin,metione PubChem CID: 876 ChEBI: CHEBI:16811 LEDER: CSCCC(N)C(O)=O

Molekylformel C5H11NO2S
PubChem CID 876
MDL-nummer MFCD00063096
CAS 59-51-8
InChI-nyckel FFEARJCKVFRZRR-UHFFFAOYNA-N
LEDER CSCCC(N)C(O)=O
ChEBI CHEBI:16811
Molekylvikt (g/mol) 149.21
Synonym dl-methionine,methionine,racemethionine,acimetion,banthionine,cynaron,lobamine,meonine,mertionin,metione
8

Thermo Scientific Chemicals D-metionin, 99 %

CAS: 348-67-4 Molekylformel: C5H11NO2S Molekylvikt (g/mol): 149.21 MDL-nummer: MFCD00002622 InChI-nyckel: FFEARJCKVFRZRR-SCSAIBSYSA-N Synonym: d-methionine,h-d-met-oh,r-methionine,d-methionin,d-metionien,methionine, d,r-2-amino-4-methylthio butanoic acid,2r-2-amino-4-methylsulfanyl butanoic acid,d-2-amino-4-methylthio butyric acid PubChem CID: 84815 ChEBI: CHEBI:16867 IUPAC-namn: (2R)-2-amino-4-metylsulfanylbutansyra LEDER: CSCC[C@@H](N)C(O)=O

Molekylformel C5H11NO2S
PubChem CID 84815
MDL-nummer MFCD00002622
IUPAC-namn (2R)-2-amino-4-metylsulfanylbutansyra
CAS 348-67-4
InChI-nyckel FFEARJCKVFRZRR-SCSAIBSYSA-N
LEDER CSCC[C@@H](N)C(O)=O
ChEBI CHEBI:16867
Molekylvikt (g/mol) 149.21
Synonym d-methionine,h-d-met-oh,r-methionine,d-methionin,d-metionien,methionine, d,r-2-amino-4-methylthio butanoic acid,2r-2-amino-4-methylsulfanyl butanoic acid,d-2-amino-4-methylthio butyric acid
9

Thermo Scientific Chemicals Seleno-L-metionin

CAS: 3211-76-5 Molekylformel: C5H11NO2Se Molekylvikt (g/mol): 196.12 MDL-nummer: MFCD00037210 InChI-nyckel: RJFAYQIBOAGBLC-BYPYZUCNSA-N Synonym: l-selenomethionine,l-+-selenomethionine,selenium-l-methionine,l-selenomethioninum,seleno-l-methionine,s-2-amino-4-methylselanyl butanoic acid,semet,s-2-amino-4-methylseleno butyric acid,unii-964mrk2pel,s-2-amino-4-methylseleno butanoic acid PubChem CID: 105024 ChEBI: CHEBI:62621 IUPAC-namn: (2S)-2-amino-4-metylselanylbutansyra LEDER: C[Se]CC[C@H](N)C(O)=O

Molekylformel C5H11NO2Se
PubChem CID 105024
MDL-nummer MFCD00037210
IUPAC-namn (2S)-2-amino-4-metylselanylbutansyra
CAS 3211-76-5
InChI-nyckel RJFAYQIBOAGBLC-BYPYZUCNSA-N
LEDER C[Se]CC[C@H](N)C(O)=O
ChEBI CHEBI:62621
Molekylvikt (g/mol) 196.12
Synonym l-selenomethionine,l-+-selenomethionine,selenium-l-methionine,l-selenomethioninum,seleno-l-methionine,s-2-amino-4-methylselanyl butanoic acid,semet,s-2-amino-4-methylseleno butyric acid,unii-964mrk2pel,s-2-amino-4-methylseleno butanoic acid
10

Thermo Scientific Chemicals DL-metioninsulfoxid, 98+%

CAS: 62697-73-8 Molekylformel: C5H11NO3S Molekylvikt (g/mol): 165.21 MDL-nummer: MFCD00002620 InChI-nyckel: QEFRNWWLZKMPFJ-UHFFFAOYNA-N Synonym: dl-methionine sulfoxide,methionine sulfoxide,2-amino-4-methylsulfinyl butanoic acid,dl-methioninesulfoxide,methionine, s-oxide,uethionine, s-oxide,butanoic acid, 2-amino-4-methylsulfinyl,2-amino-4-methylsulfinyl butyric acid,2-amino-4-methanesulfinylbutanoic acid,butyric acid, 2-amino-4-methylsulfinyl PubChem CID: 847 ChEBI: CHEBI:49033 LEDER: CS(=O)CCC(N)C(O)=O

Molekylformel C5H11NO3S
PubChem CID 847
MDL-nummer MFCD00002620
CAS 62697-73-8
InChI-nyckel QEFRNWWLZKMPFJ-UHFFFAOYNA-N
LEDER CS(=O)CCC(N)C(O)=O
ChEBI CHEBI:49033
Molekylvikt (g/mol) 165.21
Synonym dl-methionine sulfoxide,methionine sulfoxide,2-amino-4-methylsulfinyl butanoic acid,dl-methioninesulfoxide,methionine, s-oxide,uethionine, s-oxide,butanoic acid, 2-amino-4-methylsulfinyl,2-amino-4-methylsulfinyl butyric acid,2-amino-4-methanesulfinylbutanoic acid,butyric acid, 2-amino-4-methylsulfinyl
11

D-Methionine methyl ester hydrochloride, 98%

CAS: 69630-60-0 Molekylformel: C6H14ClNO2S Molekylvikt (g/mol): 199.69 MDL-nummer: MFCD00070385 InChI-nyckel: MEVUPUNLVKELNV-NUBCRITNSA-N Synonym: h-d-met-ome.hcl,d-methionine methyl ester hydrochloride,h-d-met-ome hcl,methyl d-methioninate-hydrogen chloride 1/1,methyl 2r-2-amino-4-methylsulfanyl butanoate hydrochloride,h-d-met-ome hydrochloride,h-d-met-omecl,d-methionine methyl ester hcl,methyl d-methioninate hydrochloride,d methionine methyl ester hydrochloride PubChem CID: 12888616 IUPAC-namn: metyl (2R)-2-amino-4-metylsulfanylbutanoat; hydroklorid LEDER: Cl.COC(=O)[C@H](N)CCSC

Molekylformel C6H14ClNO2S
PubChem CID 12888616
MDL-nummer MFCD00070385
IUPAC-namn metyl (2R)-2-amino-4-metylsulfanylbutanoat; hydroklorid
CAS 69630-60-0
InChI-nyckel MEVUPUNLVKELNV-NUBCRITNSA-N
LEDER Cl.COC(=O)[C@H](N)CCSC
Molekylvikt (g/mol) 199.69
Synonym h-d-met-ome.hcl,d-methionine methyl ester hydrochloride,h-d-met-ome hcl,methyl d-methioninate-hydrogen chloride 1/1,methyl 2r-2-amino-4-methylsulfanyl butanoate hydrochloride,h-d-met-ome hydrochloride,h-d-met-omecl,d-methionine methyl ester hcl,methyl d-methioninate hydrochloride,d methionine methyl ester hydrochloride
12

L-Methionine methyl ester hydrochloride, 99%

CAS: 2491-18-1 Molekylformel: C6H14ClNO2S Molekylvikt (g/mol): 199.69 MDL-nummer: MFCD00012491,MFCD00067540 InChI-nyckel: MEVUPUNLVKELNV-UHFFFAOYNA-N Synonym: h-met-ome.hcl,l-methionine methyl ester hydrochloride,h-met-ome hydrochloride,methionine methyl ester hcl,methyl 2s-2-amino-4-methylsulfanyl butanoate hydrochloride,h-d-met-ome hydrochloride,met-ome.hcl,met-ome. hcl,h-met-ome. hcl,pubchem14925 PubChem CID: 11435579 IUPAC-namn: metyl (2S)-2-amino-4-metylsulfanylbutanoat; hydroklorid LEDER: [H+].[Cl-].COC(=O)C(N)CCSC

Molekylformel C6H14ClNO2S
PubChem CID 11435579
MDL-nummer MFCD00012491,MFCD00067540
IUPAC-namn metyl (2S)-2-amino-4-metylsulfanylbutanoat; hydroklorid
CAS 2491-18-1
InChI-nyckel MEVUPUNLVKELNV-UHFFFAOYNA-N
LEDER [H+].[Cl-].COC(=O)C(N)CCSC
Molekylvikt (g/mol) 199.69
Synonym h-met-ome.hcl,l-methionine methyl ester hydrochloride,h-met-ome hydrochloride,methionine methyl ester hcl,methyl 2s-2-amino-4-methylsulfanyl butanoate hydrochloride,h-d-met-ome hydrochloride,met-ome.hcl,met-ome. hcl,h-met-ome. hcl,pubchem14925
13

DL-metioninsulfon, 98 %, Thermo Scientific Chemicals

CAS: 820-10-0 Molekylformel: C5H11NO4S Molekylvikt (g/mol): 181.21 MDL-nummer: MFCD00025079 InChI-nyckel: UCUNFLYVYCGDHP-UHFFFAOYNA-N Synonym: dl-methionine sulfone,methionine sulfone,2-amino-4-methylsulfonyl butanoic acid,butanoic acid, 2-amino-4-methylsulfonyl,d,l-methionine sulfone,methioninesulfone,dl-2-amino-4-methylsulfonyl butanoic acid,2-amino-4-methylsulfonyl butyric acid,methionine, s,s-dioxide,butyric acid, 2-amino-4-methylsulfonyl-, dl PubChem CID: 69961 IUPAC-namn: 2-amino-4-metylsulfonylbutansyra LEDER: CS(=O)(=O)CCC(N)C(O)=O

Molekylformel C5H11NO4S
PubChem CID 69961
MDL-nummer MFCD00025079
IUPAC-namn 2-amino-4-metylsulfonylbutansyra
CAS 820-10-0
InChI-nyckel UCUNFLYVYCGDHP-UHFFFAOYNA-N
LEDER CS(=O)(=O)CCC(N)C(O)=O
Molekylvikt (g/mol) 181.21
Synonym dl-methionine sulfone,methionine sulfone,2-amino-4-methylsulfonyl butanoic acid,butanoic acid, 2-amino-4-methylsulfonyl,d,l-methionine sulfone,methioninesulfone,dl-2-amino-4-methylsulfonyl butanoic acid,2-amino-4-methylsulfonyl butyric acid,methionine, s,s-dioxide,butyric acid, 2-amino-4-methylsulfonyl-, dl
14

Thermo Scientific Chemicals L-metioninsulfon, 98+%

CAS: 7314-32-1 Molekylformel: C5H11NO4S Molekylvikt (g/mol): 181.21 MDL-nummer: MFCD00066020 InChI-nyckel: UCUNFLYVYCGDHP-BYPYZUCNSA-N Synonym: l-methionine sulfone,s-2-amino-4-methylsulfonyl butanoic acid,s-dioxymethionine,l-2-amino-4-methylsulfonyl butanoic acid,2s-2-amino-4-methylsulfonylbutanoic acid,2s-2-amino-4-methanesulfonylbutanoic acid,methionine s,s-dioxide,s-amino-4-methylsulphonyl butyric acid,h-met o 2-oh,l-methioninesulfone,99+% PubChem CID: 445282 ChEBI: CHEBI:21363 IUPAC-namn: (2S)-2-amino-4-metylsulfonylbutansyra LEDER: CS(=O)(=O)CC[C@H](N)C(O)=O

Molekylformel C5H11NO4S
PubChem CID 445282
MDL-nummer MFCD00066020
IUPAC-namn (2S)-2-amino-4-metylsulfonylbutansyra
CAS 7314-32-1
InChI-nyckel UCUNFLYVYCGDHP-BYPYZUCNSA-N
LEDER CS(=O)(=O)CC[C@H](N)C(O)=O
ChEBI CHEBI:21363
Molekylvikt (g/mol) 181.21
Synonym l-methionine sulfone,s-2-amino-4-methylsulfonyl butanoic acid,s-dioxymethionine,l-2-amino-4-methylsulfonyl butanoic acid,2s-2-amino-4-methylsulfonylbutanoic acid,2s-2-amino-4-methanesulfonylbutanoic acid,methionine s,s-dioxide,s-amino-4-methylsulphonyl butyric acid,h-met o 2-oh,l-methioninesulfone,99+%
15

BOC-L-metionin, +99 %, Thermo Scientific Chemicals

CAS: 2488-15-5 Molekylformel: C10H19NO4S Molekylvikt (g/mol): 249.33 MDL-nummer: MFCD00065586 InChI-nyckel: IMUSLIHRIYOHEV-ZETCQYMHSA-N Synonym: boc-l-methionine,boc-met-oh,n-boc-l-methionine,n-tert-butoxycarbonyl-l-methionine,tert-butoxycarbonyl-l-methionine,s-2-tert-butoxycarbonyl amino-4-methylthio butanoic acid,n-alpha-t-butyloxycarbonyl-l-methionine,methionine, n-1,1-dimethylethoxy carbonyl,l-methionine, n-1,1-dimethylethoxy carbonyl PubChem CID: 89857 LEDER: CSCC[C@H](NC(=O)OC(C)(C)C)C(O)=O

Molekylformel C10H19NO4S
PubChem CID 89857
MDL-nummer MFCD00065586
CAS 2488-15-5
InChI-nyckel IMUSLIHRIYOHEV-ZETCQYMHSA-N
LEDER CSCC[C@H](NC(=O)OC(C)(C)C)C(O)=O
Molekylvikt (g/mol) 249.33
Synonym boc-l-methionine,boc-met-oh,n-boc-l-methionine,n-tert-butoxycarbonyl-l-methionine,tert-butoxycarbonyl-l-methionine,s-2-tert-butoxycarbonyl amino-4-methylthio butanoic acid,n-alpha-t-butyloxycarbonyl-l-methionine,methionine, n-1,1-dimethylethoxy carbonyl,l-methionine, n-1,1-dimethylethoxy carbonyl