CAS No.: 71751-41-2 (abamectin); 65195-55-3 (i); 65195-56-4 (ii) CAS Name: Avermectin B1 Molecular Formula: C48H72O14 (B1a); C47H70O14 (B1b) Agrochemical Type: Insecticide/acaricide, avermectin Mode of Action: Insecticide and acaricide with contact and stomach action. Has limited plant systemic activity, but exhibits translaminar movement.