| 1820-81-1 | 5-Chlorouracil | C4H3ClN2O2 |
| 1820-80-0 | 3-Aminopyrazole | C3H5N3 |
| 1820-73-1 | L-GLUTAMIC ACID GAMMA-HYDRAZIDE | C5H11 N3 O3 |
| 1820-59-3 | 2,4,2',4'-tetranitrobiphenyl | C12H6 N4 O8 |
| 1820-94-6 | 2-amino-4-methyl-5-hydroxyethylthiazole | C6H10 N2 O S |
| 1820-99-1 | 5,5'-THIODISALICYLIC ACID | C14H10 O6 S |