acetic acid 2-[4-(5-acetoxy-4-methoxy-4,6-dimethyl-tetrahydro-pyran-2-yloxy)-14-ethyl-12,13-dihydroxy-3,5,7,9,11,13-hexamethyl-2,10-dioxo-7-prop-2-ynyloxy-oxacyclotetradec-6-yloxy]-4-dimethylamino-6-methyl-tetrahydro-pyran-3-yl ester

acetic acid 4-dimethylamino-2-(4-ethyl-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

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

6-O-propargyl erythromycin A