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Milbemycin Oxime
Mixture of milbemycin A3 oxime and milbemycin A4 oxime
[129496-10-2] Milbemycin A3 Oxime
C31H43NO7 541.68
Milbemycin B, 5-O-demethyl-28-deoxy-25-methyl-6,28-epoxy-23-hydroxyimino-, [6R,23S,25S(E)]-; (2αE,4E,5′S,6R,6′S,8E,11R,13R,15S,17αR,20αR,20βS)-3′,4′,5′,6,6′,7,10,11,14,15,17α,20,20α,20β-tetradecahydro-20β-hydroxy-5′,6′,6,8,19-pentamethylspiro[11,15-methano-2H,13H,17H-furo[4,3,2-pq][2,6]benzodioxacyclooctadecin-13,2′-[2H]pyran]-17-one 20-oxime.
Milbemycin A4 Oxime
C32H45NO7 555.70
Milbemycin B, 5-O-demethyl-28-deoxy-25-ethyl-6,28-epoxy-23-hydroxyimino-, [6R,23S,25S(E)]-; (2αE,4E,5′S,6R,6′S,8E,11R,13R,15S,17αR,20αR,20βS)-6′-ethyl-3′,4′,5′,6,6′,7,10,11,14,15,17α,20,20α,20β-tetradecahydro-20β-hydroxy-5′,6,8,19-tetramethylspiro[11,15-methano-2H,13H,17H-furo[4,3,2-pq][2,6]benzodioxacyclooctadecin-13,2′-[2H]pyran]-17-one 20-oxime.

DEFINITION

Milbemycin Oxime is a mixture of milbemycin A4 oxime and milbemycin A3 oxime. It contains NLT 95.0% and NMT 102.0% of the sum of milbemycin A4 oxime and milbemycin A3 oxime, calculated on the anhydrous basis. The ratio of milbemycin A4 oxime is NLT 0.75.

USP REFERENCE STANDARDS FOR PURCHASE

USP Milbemycin Oxime RS
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