| 900-95-8 | Fentin acetate | C20H18O2Sn |
| 900-00-5 | 4-Pyridinecarboxylicacid, 2-(6-methoxy-4-nitroso-7-oxo-1,3,5-cycloheptatrien-1-yl)hydrazide | C14H12 N4 O4 |
| 900-47-0 | 2-Furaldehyde, 5-nitro-, 3-octyl-3-thioisosemicarbazone, monohydrochloride | C14H22 N4 O3 S . Cl H |