Avermectin B1a

Avermectin B1a is a macrocyclic lactone disaccharide anthelmintic agent that binds to high and low affinity sites on the mammalian GABAA receptor. Binding to the high affinity site activates the receptor to increase chloride influx, while binding to the low affinity site blocks the channel. 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). Formulations containing avermectin B1a (>80%) and avermectin B1b (~20%, Cay-17453) are used in insecticides and veterinary anthelmintic formulas as abamectin (Cay-19201).Formal Name: 5-O-demethyl-avermectin A1a. CAS Number: 65195-55-3. Synonyms: Abamectin B1a, Antibiotic C 076B1a, L-676,863. Molecular Formula: C48H72O14. Formula Weight: 873.1. Purity: >95%. Formulation: (Request formulation change), A solid. Solubility: Chloroform: Slightly soluble, DMSO: Slightly soluble, Methanol: Slightly soluble. lambdamax: 246 nm. SMILES: C/C([C@@H](O[C@@]1([H])C[C@H](OC)[C@@H](O[C@]2([H])O[C@@H](C)[C@H](O)[C@@H](OC)C2)[C@H](C)O1)[C@@H](C)/C=C/C=C(CO3)/[C@@]([C@@]3([H])[C@H](O)C(C)=C4)(O)[C@]4([H])C5=O)=C\C[C@]6([H])C[C@@](O5)([H])C[C@]7(C=C[C@H](C)[C@]([C@@H](C)CC)([H])O7)O6. InChi Code: InChI=1S/C48H72O14/c1-11-25(2)43-28(5)17-18-47(62-43)23-34-20-33(61-47)16-15-27(4)42(26(3)13-12-14-32-24-55-45-40(49)29(6)19-35(46(51)58-34)48(32,45)52)59-39-22-37(54-10)44(31(8)57-39)60-38-21-36(53-9)41(50)30(7)56-38/h12-15,17-19,25-26,28,30-31,33-45,49-50,52H,11,16,20-24H2,1-10H3/b13-12+,27-15+,32-14+/t25-,26-,28-,30-,31-,33+,34-,35-,36-,37-,38-,39-,40+,41-,42-,43+,44-,45+,47+,48+/m0/s1. InChi Key: RRZXIRBKKLTSOM-XPNPUAGNSA-N.