The molecule is a milbemycin originally isolated from Streptomyces hygroscopicus with formula C33H48O7 that has insecticidal and anthelmintic proerties. It has a role as an insecticide, an anthelminthic drug and a nematicide.
(1R,4S,5'S,6R,6'R,8R,10E,13R,14E,16E,20R,21R,24S)-21,24-dihydroxy-5',11,13,22-tetramethyl-6'-propan-2-ylspiro[3,7,19-trioxatetracyclo[15.6.1.14,8.020,24]pentacosa-10,14,16,22-tetraene-6,2'-oxane]-2-one