3-(5-iodoisoxazol-3-yl)pyridazine

benzoic acid 4-dimethylamino-2-(4-ethyl-7-fluoro-3a,7,9,11,13,15-hexamethyl-2,6,8,14-tetraoxo-11-prop-2-ynyloxy-tetradecahydro-3,5-dioxa-1-aza-cyclopentacyclotetradecen-10-yloxy)-6-methyl-tetrahydro-pyran-3-yl ester

6-O-propargyl-2'-O-benzoyl-4''-O-benzoylerythromycin

pyridazine-3-carbaldehyde oxime