acetic 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