| L-Pyroglutamic anhydride | NMG749QY96 | chemical |
| L-RHAMNITOL | IHI9UGC58P | chemical |
| L-RISTOSAMINE PYRANOSE, (R)- | Y5T2AJP16N | chemical |
| L-RISTOSAMINE PYRANOSE, (S)- | XC40Z30DJB | chemical |
| L-SCORBAMIC ACID | E95ND7Z064 | chemical |
| L-SELECTIN | G75G5XNC3C | protein |
| L-SELECTRIDE | J471N7T23N | chemical |
| L-SERINE, N-(3,4-DIFLUORO-2-((2-FLUORO-4-IODOPHENYL)AMINO)BENZOYL)- | YXZ9926HUV | chemical |
| L-Selenalysine | BS75B9MU4J | chemical |
| L-Selenalysine SE-75 | 6V5ZW3888S | chemical |
| L-THREO-.ALPHA.-D-GALACTO-OCTOPYRANOSIDE, METHYL 7-CHLORO-6,7,8-TRIDEOXY-3,4-O-(1-METHYLETHYLIDENE)-6-((((2S,4R)-1-METHYL-4-PROPYL-2-PYRROLIDINYL)CARBONYL)AMINO)-1-THIO-, 2-HEXADECANOATE | 635KF5P2JS | chemical |
| L-THREONINOL | A16V466XOD | chemical |
| L-THREONYL-L-PROLYL-L-PROLYL-L-THREONINE | A98MYD1EUX | chemical |
| L-TOPAQUINONE | PAG3GKA51Y | chemical |
| L-TYROSYLGLYCINE | QJH0S8U69Z | chemical |
| L-TYROSYLGLYCYLGLYCINE | DS6B3J0V03 | chemical |
| L-Threonine (2S)-2-amino-2-carboxyethyl ester | KN7U54F9LQ | chemical |
| L-Threonyl-L-arginine | 3GS43D7X43 | chemical |
| L-Tyrosine N-carboxyanhydride | L4469SQ763 | chemical |
| L-Tyrosinol hydriodide | LH96LZ79S9 | chemical |
| L-Tyrosyl-L-alanine | Y2DJ9AYE8Z | chemical |
| L-Tyrosyl-L-serine | 232T5N976E | chemical |
| L-Veratrylglycine | GC6UEI64EC | chemical |
| L-WILLARDIINE | X2R4I0X4W9 | chemical |
| L-Xylonic acid, ?-lactone | JDL6UAT2QC | chemical |
| L-amino-acid oxidase | BWA4V54TVD | protein |
| L-ido Miglustat | EEQ2P5TT77 | chemical |
| L-isoleucyl-2-methylalanine | YHG8ATL7DB | chemical |
| L-lactate dehydrogenase A chain | 4IDZ3J79QQ | protein |
| L-lactate dehydrogenase A chain (4) | 6KZ7Q3EK5S | protein |
| L-lactate dehydrogenase A chain/L-lactate dehydrogenase B chain tetramer (3:1) | 99A8AP8YFK | protein |
| L-lactate dehydrogenase B chain tetramer | 84FU6LN77D | protein |
| L-phenylephrine p-menthane carboxamide, (1R,3R,4S)- | NQM88PGU9N | chemical |
| L-ribo-D-allo-Tridec-12-enonic acid, 3,7:6,10-dianhydro-2,4,5,12,13-pentadeoxy-8,9,11-tris-O-[(1,1-dimethylethyl)dimethylsilyl]-13-iodo-, ethyl ester, (12E)- | P74HL2ZRC6 | chemical |
| L-tyrosyl-L-lysyl-L-leucyl-L-valyl-L-valyl-L-valylglycyl-L-alanyl-L-cysteinylglycyl-L-valylglycyl-L-lysyl-L-seryl-L-alanyl-L-leucyl-L-threonyl-L-Isoleucine | W28K2C7B8U | protein |
| LA-419 | BZS56QX3MP | chemical |
| LA-810 | 627621I89N | chemical |
| LABDANUM OIL | 67GS9BGA2X | structurallyDiverse |
| LABETALOL | R5H8897N95 | chemical |
| LABETALOL, (S,S)- | OPX88UNT44 | chemical |
| LABETOLOL, (R,S)- | GA3AWI2QBK | chemical |
| LABETOLOL, (S,R)- | JX0KHY13AT | chemical |
| LABETUZUMAB | EFE6X5M3UY | protein |
| LABETUZUMAB GOVITECAN | 8E3HI6QQ9J | protein |
| LABISIA PUMILA WHOLE | GZ2Z723D7C | structurallyDiverse |
| LABLAB PURPUREUS WHOLE | G9WW6WBS1N | structurallyDiverse |
| LABRADIMIL | 2MK663C346 | chemical |
| LABRADOR REDFISH | 9YY35OAA4P | structurallyDiverse |
| LABRADOR REDFISH WHOLE | 6O823W532D | structurallyDiverse |
| LABRADOR REDFISH, COOKED | YTA1DAA78E | structurallyDiverse |