Chemical Name:(6R,23E,25S)-25-[(2E)-but-2-en-2-yl]-5-O-Demethyl-28-deoxy-6,28-epoxy-23-(methoxyimino)milbemycin B (as per EP) ; (2aE,4E,5'R,6R,6'S,8E,11R,13S,15S,17aR,20R,20aR,20bS)-6'-[(E)-But-2-en-2-yl]-5',6,6',7,10,11,14,15,17a,20,20a,20b-dodecahydro-20,20b-dihydroxy-5',6,8,19-tetramethylspiro[11,15-methano-2H,13H,17H-furo[4,3,2-pq][2,6]benzodioxacyclooctadecin-13,2'-[2H]pyran]-4',17(3'H)-dione 4'-(E)-(O-methyloxime) (as per USP)
