(6R,22S,23R,25R)-5-O-Demethyl-28-deoxy-6,28-epoxy-22-hydroxy-25-methyl-23-((2-methyl-1-oxohexyl)oxy)milbemycin B 51798-80-2 Milbemycin B, 5-O-demethyl-28-deoxy-6,28-epoxy-22-hydroxy-25-methyl-23-((2-methyl-1-oxohexyl)oxy)-, (6R,22S,23R,25R)-