selamectin and its Impurities
A topical anti-parasitic drug used on dogs and cats. Structurally, it is related to ivermectin and milbemycin and is not approved for human use. Reference standards of Selamectin API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.
Selamectin - Impurity A
(5Z,23S,25R)-25-Cyclohexyl-4'-O-de(2,6-dideoxy-3-O-methyl-α-L-arabino-hexopyranosyl)-5-demethoxy-25-de(1-methylpropyl)-22,23-dihydro-23-hydroxy-5-hydroxyiminoavermectin A1a
Catalogue No.:PA 19 88010
CAS :
NA
Molecular Formula : C43H63NO12
Molecular Weight : 785.97
Avermectin A1a, 25-cyclohexyl-4′-O-de(2,6-dideoxy-3-O-methyl-α-L-arabino-hexopyranosyl)-5-demethoxy-25-de(1-methylpropyl)-22,23-dihydro-23-hydroxy-5-(hydroxyimino)-, (23S)
Avermectin A1a, 25-cyclohexyl-4′-O-de(2,6-dideoxy-3-O-methyl-α-L-arabino-hexopyranosyl)-5-demethoxy-25-de(1-methylpropyl)-22,23-dihydro-23-hydroxy-5-(hydroxyimino)-, (23S)
Catalogue No.:PA 19 0881002
CAS :
165108-08-7
Molecular Formula : C43H63NO12
Molecular Weight : 785.97
Milbemycin B, 25-cyclohexyl-5-demethoxy-28-deoxy-6,28-epoxy-13-hydroxy-5-(hydroxyimino)-, (5Z,6R,13R,25S)
Milbemycin B, 25-cyclohexyl-5-demethoxy-28-deoxy-6,28-epoxy-13-hydroxy-5-(hydroxyimino)-, (5Z,6R,13R,25S)
Catalogue No.:PA 19 0881001
CAS :
856163-42-3
Molecular Formula : C36H51NO8
Molecular Weight : 625.8
