• L-Alanine,N-[(phenylmethoxy)carbonyl]-L-leucyl-
• 2817-13-2
• C₁₇H₂₄N₂O₅
• 220-571-1
• 336.38
• .

• L-Alanine,N-[hydroxy[(1R)-2-phenyl-1-[[(phenylmethoxy)carbonyl]amino]ethyl]phosphinyl]-L-leucyl-
• 110786-00-0
• C25H34 N3 O7 P
• 519.5271
• .

• Luteinizinghormone-releasing factor
• 9034-40-6
• C₅₅H₇₅N₁₇O₁₃
• 232-895-0
• 1182.33
• .

• L-Valine,N-[N-[[2-[2-[[N-[N-[N-[(1,1-dimethylethoxy)carbonyl]-L-seryl]-L-alanyl]-L-alanyl]amino]-1-hydroxy-3-phenylpropyl]cyclopentyl]carbonyl]-L-valyl]-,methyl ester, [1S-[1a,2b(1S*,2R*)]]- (9CI)
• 126333-30-0
• C40H64 N6 O11
• 804.9698
• .

• L-Arabinonic acid,calcium salt (2:1)
• 5346-83-8
• C5H10 O6 . 1/2 Ca
• 226-302-4
• 370.32
• .

• L-Lysinamide,N-acetyl-L-histidyl-L-seryl-L-a-aspartyl-L-alanyl-L-valyl-L-phenylalanyl-L-threonyl-L-a-glutamyl-L-asparaginyl-O-methyl-L-tyrosyl-L-threonyl-L-lysyl-L-leucyl-L-arginyl-L-lysyl-L-glutaminyl-L-norleucyl-L-alanyl-L-alanyl-L-lysyl-L-lysyl-L-tyrosyl-L-leucyl-L-asparaginyl-L-a-aspartyl-L-leucyl-L-lysyl-, (25®21)-lactam (9CI)
• 150828-75-4
• C153H247 N43 O42
• .

• L-Serine, N-[N-[N-(N-L-a-glutamyl-L-leucyl)-L-valyl]-L-isoleucyl]-(9CI)
• 142525-11-9
• C25H45 N5 O9
• 559.6529
• .

• L-Threoninamide,N2-(1-oxooctyl)-L-asparaginyl-L-tyrosyl- (9CI)
• 117978-19-5
• C25H39 N5 O7
• 0
• .

• L-Tyrosinamide,N-acetyl-L-leucyl-L-arginyl-L-histidyl-L-tyrosyl-L-leucyl-L-asparaginyl-L-leucyl-L-leucyl-L-threonyl-L-arginyl-L-glutaminyl-L-arginyl-
• 155709-24-3
• C81H131 N27 O19
• 1787.08
• .

• L-Leucine,N-[[(2-chloroethyl)nitrosoamino]carbonyl]-, methyl ester
• 102586-03-8
• C10H18 Cl N3 O4
• 0
• .

• L-Proline,4-hydroxy-1-nitroso-, (4R)-
• 30310-80-6
• C5H8 N2 O4
• 160.15
• .

• L-Phenylalanine,N-[8-[(aminoiminomethyl)amino]-1-oxooctyl]-L-a-aspartyl- (9CI)
• 144075-77-4
• C22H33 N5 O6
• .

• L-Prolinamide,(4S)-hexahydro-1-methyl-2,6-dioxo-4-pyrimidinecarbonyl-L-histidyl-
• 103300-74-9
• C₁₇H₂₃N₇O₅
• 405.41
• .

• L-Glutamic acid,N-[4-[[(2-amino-5-chloro-1,4-dihydro-4-oxo-6-quinazolinyl)amino]methyl]benzoyl]-(9CI)
• 102743-78-2
• C21H20 Cl N5 O6
• 0
• .

• L-Phenylalaninamide,L-phenylalanyl-
• 15893-46-6
• C18H21 N3 O2
• 311.3782
• .

• L-Leucine,N-[7-[(1R,2R,3R)-2-[(1E,3S)-3-[(1S,3S)-3-butylcyclopentyl]-3-hydroxy-1-propenyl]-3-hydroxy-5-oxocyclopentyl]-1,6-dioxoheptyl]-(9CI)
• 111111-04-7
• C30H49 N O7
• 535.7126
• .

• Linderalactone
• 728-61-0
• C₁₅H₁₆O₃
• 244.2857
• .

• L-Valine,L-valyl-L-valyl-, 2-[[5-(dimethylamino)-1-naphthalenyl]sulfonyl]hydrazide (9CI)
• 76080-91-6
• C27H42 N6 O5 S
• 0
• .

• L-Methionine,N-[N-[N-[N-(O-sulfo-L-tyrosyl)glycyl]glycyl]-L-phenylalanyl]- (9CI)
• 81788-49-0
• C27H35 N5 O10 S2
• 0
• .

• Lead, isotope of mass206
• 13966-27-3
• Pb
• 0
• .

• L-Tryptophan,glycyl-L-asparaginyl-L-tryptophyl-L-histidylglycyl-L-threonyl-L-alanyl-L-prolyl-L-a-aspartyl-L-tryptophyl-L-valyl-L-tyrosyl-L-phenylalanyl-L-alanyl-L-histidyl-L-leucyl-L-a-aspartyl-L-isoleucyl-L-isoleucyl-(9CI)
• 151308-49-5
• C117H152 N28 O28
• .

• L-Argininamide,N-[(phenylmethoxy)carbonyl]-L-tyrosyl-L-lysyl-N-(4-nitrophenyl)- (9CI)
• 108318-36-1
• C35H45 N9 O8
• 0
• .

• L-Cysteine,S-(2-aminoethyl)-
• 2936-69-8
• C5H12 N2 O2 S
• 164.22598
• .

• L-Asparagine, ethylester
• 24184-58-5
• C6H12 N2 O3
• 246-068-7
• 160.1711
• .

• L-Phenylalanine,N-[(phenylmethoxy)carbonyl]-L-tryptophyl- (9CI)
• 6521-49-9
• C28H27 N3 O5
• 485.53
• .

• Lup-20(29)-en-28-oicacid, 3-(acetyloxy)-, (3b)-
• 10376-50-8
• C₃₂H₅₀O₄
• 498.737
• .

• L-Histidine,5-mercapto-3-methyl-
• 108418-13-9
• C7H11 N3 O2 S
• 0
• .

• L-Alaninamide,N-(3-methyl-1-oxobutyl)-L-phenylalanyl-L-norleucyl-(3S,4S)-4-amino-3-hydroxy-6-methylheptanoyl-N-[(1S)-1-[(1S)-2-carboxy-1-hydroxyethyl]-3-methylbutyl]-
• 98092-14-9
• C39H65 N5 O9
• 747.96
• .

• L-Cystine,N,N'-bis(1-oxobutyl)-
• 85038-49-9
• C14H24 N2 O6 S2
• 285-193-1
• 261.33786
• .

• L-Tyrosine,3-(iodo-131I)-
• 16624-40-1
• C9H10 I N O3
• 311.0867
• .

• Lanost-9(11)-en-18-oicacid, 3-[[2-O-(6-deoxy-b-D-glucopyranosyl)-4-O-sulfo-b-D-xylopyranosyl]oxy]-12,17,20-trihydroxy-, g-lactone, sodium salt (1:1), (3b,12a)-
• 75410-52-5
• C41H66 O16 S . Na
• 0
• .

• L-Proline,1-[(4-chlorophenyl)sulfonyl]-
• 73096-27-2
• C11H12 Cl N O4 S
• 289.74
• .

• Lanette N
• 8038-28-6
• 0
• .

• Laquinimod
• 248281-84-7
• C₁₉H₁₇ClN₂O₃
• 356.8029
• .

• L-Phenylalanine,N-[(phenylmethoxy)carbonyl]-L-valyl-
• 19542-51-9
• C22H26 N2 O5
• 398.4522
• .

• L-Tyrosine,O-(4-hydroxy-3,5-diiodophenyl)-3,5-diiodo-, monosodium salt, hydrate (9CI)
• 25416-65-3
• C₁₅H₁₀I₄NNaO₄.xH₂O
• 200-221-4
• 798.86
• .

• L-Homocysteine,S-[(3S)-3-amino-3-carboxypropyl]-
• 31982-10-2
• C8H16 N2 O4 S
• 0
• .

• L-Leucinamide,N-acetyl-L-leucyl-N-[(1S)-4-[(aminoiminomethyl)amino]-1-formylbutyl]-
• 55123-66-5
• C20H38 N6 O4
• 426.64
• .

• Lanosta-8,24-dien-21-oicacid, (13a,14b,17a,20S)- (9CI)
• 28368-21-0
• C30H48 O2
• .

• L-Proline, L-valyl-
• 20488-27-1
• C10H18 N2 O3
• 0
• .

• L-Lysine,N6,N6-dimethyl-
• 2259-86-1
• C₈H₁₈N₂O₂
• 210.7
• .

• L-Lysinamide,L-lysyl-L-tryptophyl-L-lysyl-L-leucyl-L-phenylalanyl-L-lysyl-L-lysyl-L-isoleucyl-L-a-glutamyl-L-lysyl-L-valylglycyl-L-glutaminyl-L-asparaginyl-L-isoleucyl-L-arginyl-L-a-aspartylglycyl-L-isoleucyl-L-isoleucyl-L-lysyl-L-alanylglycyl-L-prolyl-L-alanyl-L-valyl-L-alanyl-L-valyl-L-valylglycyl-L-glutaminyl-L-alanyl-L-threonyl-L-glutaminyl-L-isoleucyl-L-alanyl-
• 80451-04-3
• C184H313 N53 O46
• 4003.83
• .

• L-Norleucine,6-hydroxy-
• 6033-32-5
• C6H13 N O3
• 147.1723
• .

• L-Isoleucine,L-histidyl-L-a-glutamyl-L-alanyl-L-prolyl-(9CI)
• 121119-48-0
• C25H39 N7 O8
• 0
• .

• L-Lysine,N2-(5-fluoro-N-L-lysyl-L-tryptophyl)- (9CI)
• 96914-16-8
• C23H35 F N6 O4
• 0
• .

• L-Proline,1-[N-[N-[[5-(dimethylamino)-1-naphthalenyl]sulfonyl]glycyl]-4-nitro-L-phenylalanyl]-(9CI)
• 80733-88-6
• C28H31 N5 O8 S
• 0
• .

• L-Glutamic acid,N-[4-[[(2,4-diamino-6-pteridinyl)methyl]ethylamino]benzoyl]-
• 14683-83-1
• C21H24 N8 O5
• 468.4659
• .

• Lazurite
• 1302-83-6
• 215-111-1
• 0
• .

• L-Phenylalanine,N-[(phenylmethoxy)carbonyl]-, ethyl ester
• 28709-70-8
• C19H21 N O4
• 299.32118
• .

• LY 171889 (9CI)
• 147371-79-7
• .