(4S,6R,23E,25S)-2,3-Didehydro-5-O-demethyl-28-deoxy-6,28-epoxy-25-[(1E)-1,3-dimethyl-1-buten-1-yl]-3,4-dihydro-23-(methoxyimino)milbemycin B; (4S)-2-Dehydro-4-hydromoxidectin
(4S,6R,23E,25S)-2,3-Didehydro-5-O-demethyl-28-deoxy-6,28-epoxy-25-[(1E)-1,3-dimethyl-1-buten-1-yl]-3,4-dihydro-23-(methoxyimino)milbemycin B; (4S)-2-Dehydro-4-hydromoxidectin