| L-LEUCYL-L-PROLYL-L-PROLYL-L-SERYL-L-ARGININE | HFL33E395I | chemical |
| L-LYSINE, LABUVIRTIDE- | XT4767M1RS | chemical |
| L-LYSINE, N6,N6'-(1,8-DIOXO-1,8-OCTANEDIYL)BIS- | 0W8AEU89FI | chemical |
| L-LYSINYL-4-GUANIDINOMETHYL-3-IODOBENZOATE, I-131 | INI2EI1OLV | chemical |
| L-LYSYL-L-ARGININE | HX25W9VLX3 | chemical |
| L-LYSYL-L-LYSINAMIDE | UDN15LS88T | chemical |
| L-Leu6-Leuprolide | 2LYN3CCQ3S | chemical |
| L-Leucine N-carboxyanhydride | 53974ZL5N4 | chemical |
| L-Leucine, O5-(N-formyl-L-leucyl)-(2S,3S,5S)-2-hexyl-3,5-dihydroxyhexadecanoyl-, (1S)-1-[[(2S,3S)-3-hexyl-4-oxo-2-oxetanyl]methyl]dodecyl ester | B2SHK4HZF5 | chemical |
| L-Leucyl-L-tryptophan | 3P49EB3X2W | chemical |
| L-Leucylglycylglycine | A2642S87E9 | chemical |
| L-Lysinamide | 13E91O1V3F | chemical |
| L-Lysyl-L-leucyl-L-lysyl-L-leucyl-L-leucyl-L-leucyl-L-leucyl-L-leucyl-L-lysyl-L-leucyl-L-lysine, pentaacetate | FV2XKU24NG | protein |
| L-Lysyl-L-proline | XVP6HTX9KN | chemical |
| L-META-TYROSINE | D5YF57V4QW | chemical |
| L-METHIONINE-METHYL-13C | 55YCX1IL8T | chemical |
| L-METHIONYL-L-ISOLEUCINE | 67UNF5G723 | chemical |
| L-METHIONYL-L-VALYL-L-PHENYLALANYL-L-LEUCYL-L-ISOLEUCINE | VUI0R88XLW | chemical |
| L-METHIONYLGLYCINE | T872MM2E20 | chemical |
| L-NAME | V55S2QJN2X | chemical |
| L-NAME HYDROCHLORIDE | TFX6A1PRZ1 | chemical |
| L-NATEGLINIDE | E9V3S85RHY | chemical |
| L-Norvaline ethyl ester | JP3R3Z8NRQ | chemical |
| L-Norvaline ethyl ester hydrochloride | FTK38QBG7R | chemical |
| L-ORNITHINE .ALPHA.-KETOISOCAPROATE | 9K1Y6V15ZY | chemical |
| L-ORNITHINE .ALPHA.-KETOISOVALERATE | 05C199JWJY | chemical |
| L-PHENYL-2,6-T2-ALANINE | U4NZ734907 | chemical |
| L-PHENYLALANINE BETAINE | GVM3V4ZCR1 | chemical |
| L-PHENYLALANINE BETAINE CATION | B7V7TG4V4W | chemical |
| L-PHENYLALANINE-.BETA.-T, (.BETA.R)- | KKL543DB2R | chemical |
| L-PHENYLALANINE-.BETA.-T, (.BETA.S)- | 5WJS4S6YS4 | chemical |
| L-PHENYLALANINE-4-T | Q48KJA6RS4 | chemical |
| L-PROLINAMIDE, (4R)-1-(10,12-DIMETHYL-1-OXOTETRADECYL)-4,5-DIHYDROXY-D-PROLYL-L-THREONYL-(4R)-4-HYDROXY-L-PROLYL-(4S)-4-HYDROXY-4-(4-HYDROXYPHENYL)-L-THREONYL-(3R)-3-HYDROXY-L-ORNITHYL-3-HYDROXY-, (3S)- | CA7LF5HCB2 | chemical |
| L-PROLINE ETHYLAMIDE | 16B70W94PN | chemical |
| L-PROLINE, 4-(4-(2-PYRIMIDINYL)-1-PIPERAZINYL)-, (4S)- | 5VTZ8049DQ | chemical |
| L-PROLINE, N-(3-HYDROXYTRICYCLO(3.3.1.13,7)DEC-1-YL)GLYCYL- | TF6NS92SLH | chemical |
| L-PROLINE-3,4-T2 | C6XZW85XI2 | chemical |
| L-PROLYLHYDROXY-L-PROLINE DIKETOPIPERAZINE | 1S0GU6E681 | chemical |
| L-Pantothenic acid | D9B629W4Q4 | chemical |
| L-Phenyl-3,4,5-t<sub>3 </sub>-alanine | 5R4E96D9T8 | chemical |
| L-Phenylalanyl-D-phenylalanine | 3C6ZN2TT83 | chemical |
| L-Phenylalanyl-L-aspartic acid | Y7LC6LG89Q | chemical |
| L-Phenylalanyl-L-histidine | KX5H2G79YZ | chemical |
| L-Phenylalanyl-L-phenylalanine | 89TM36C65S | chemical |
| L-Phenylalanyl-L-phenylalanyl-L-phenylalanine | QW358DEW7W | chemical |
| L-Piperacillin | WR79XRN93Q | chemical |
| L-Proline (2S)-2-amino-2-carboxyethyl ester | BT8PD9JQB7 | chemical |
| L-Proline, 5-oxo-, compd. with ?-(1-aminoethyl)benzenemethanol (1:1) | 7SU95G6D4A | chemical |
| L-Proline, compd. with N-[(4-hydroxy-1-methyl-7-phenoxy-3-isoquinolinyl)carbonyl]glycine | PEE7NE55VU | chemical |
| L-Prolyl-L-glutaminyl-L-?-glutamyl-L-isoleucine | H8H3C373FD | chemical |