Formulation: A solid
Formal Name: 5-O-demethyl-avermectin A1a
Purity: ≥95%
Formula Markup: C48H72O14
Formula Weight: 873,1
Shelf life (days): 1460
CAS Number: 65195-55-3
Notes: Avermectin B1a is a macrocyclic lactone disaccharide anthelmintic agent that binds to high and low affinity sites on the mammalian GABAA receptor.{35015,35017,35019} Binding to the high affinity site activates the receptor to increase chloride influx, while binding to the low affinity site blocks the channel.{35019} Avermectin B1a inhibits binding of the glycine receptor antagonist strychnine to membranes and the solubilized receptor from rat spinal cord (Kis = 1.3 and 3.6 µM, respectively).{35020} Formulations containing avermectin B1a (>80%) and avermectin B1b (~20%; Item No. 17453) are used in insecticides and veterinary anthelmintic formulas as abamectin (Item No. 19201).{35016,35018}