Moxidectin - Impurity D

NA

(6R,23E,25S)-5-O-demethyl-28-deoxy-6,28-epoxy-23-(methoxyimino)-25-[(2E)-4-methylpent-2-en-1-yl]-2-epimilbemycin B; Moxidectin 17a-epimer; (2aE,4E,5′R,6R,6′S,8E,11R,13S,15S,17aS,20R,20aR,20bS)-5′,6,6′,7,10,11,14,15,17a,20,20a,20b-Dodecahydro-20,20b-dihydroxy-6′-[(E)-4-methylpent-2-en-2-yl]-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) (USP);