| 52-90-4 | L-Cysteine | C3H7NO2S |
| 52-28-8 | Codeine phosphate | C18H21NO3•H3O4P |
| 52-51-7 | 2-Bromo-2-nitro-1,3-propanediol | C3 H6BrNO4 |
| 52-68-6 | Chlorophos | C4H8Cl3O4P |
| 52-01-7 | 17-Hydroxy-7-alpha-mercapto-3-oxo-17-alpha-pregn-4-ene-21-carboxylic acid-gamma-lactone-7-acetate | C24H32O4S |
| 52-24-4 | Triethylenethiophosphoramide | C6H12N3PS |
| 52-26-6 | MORPHINIUM CHLORIDE | C17H19 N O3 . Cl H |
| 52-21-1 | Prednisolone-21-acetate | C23H30O6 |
| 52-67-5 | 3,3-Dimethyl-D(-)-cysteine | C5H11NO2S |
| 52-39-1 | ALDOSTERONE | C21H28O5 |
| 52-66-4 | DL-PENICILLAMINE | C5H11 N O2 S |
| 52-88-0 | ATROPINE METHYL NITRATE | C18H26NO3•NO3 |
| 52-86-8 | Haloperidol | C21H23ClFNO2 |
| 52-76-6 | Lynestrenol | C20H28O |
| 52-52-8 | Cycloleucine | C6H11NO2 |
| 52-78-8 | Norethandrolone | C20H30O2 |
| 52-49-3 | Benzhexol hydrochloride | C20H32ClNO |
| 52-43-7 | ALLOBARBITAL | C10H12 N2 O3 |
| 52-62-0 | PENTOLINIUM TARTRATE | C15H32N2•2C4H5O6 |
| 52-00-6 | Spiro[chrysene-1(2H),2'-[1,3]dioxolane],3,5,6,11,12,12a-hexahydro-8-methoxy-12a-methyl-, (S)- (9CI) | C22H26 O3 |
| 52-12-0 | tetrafluorophthalicanhydride | C23H29 Cl O6 |
| 52-31-3 | CYCLOBARBITAL | C12H16 N2 O3 |
| 52-46-0 | 2,2,4,4,6,6-hexaaziridin-1-yl-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-tri phosphacyclohexa-1,3,5-triene | C12H24 N9 P3 |
| 52-61-9 | N-benzyl-3-pyrrolidylacetate methobromide | C14H20 N O2 . Br |
| 52-64-2 | GLYCINE, [2-14C] | C2H5NO2 |
| 52-73-3 | (1S,3aS,3bR,5aS,7R,8aS,8bS,10aS)-7-ethynyl-1,8a,10a-trimethylhexadecahydrodicyclopenta[a,f]naphthalene-1,7-diol | C21H32O2 |