The molecule is a macrolide antibiotic that was originally isolated from the culture broths of Streptomyces hygroscopicus var. ossamyceticus. It has a role as an antineoplastic agent and a bacterial metabolite. It is a macrolide antibiotic, a spiroketal, a cyclic hemiketal, a secondary alcohol, a tertiary alcohol and an organic heterotetracyclic compound.
(1S,3S,6'R,7S,8E,15R,16R,17S,18R,19R,20S,21R,22E,26S,28R,30R)-17-[(2S,5S,6S)-5-(dimethylamino)-6-methyloxan-2-yl]oxy-3,15,16,18,20,21-hexahydroxy-6'-[(2R)-2-hydroxybutyl]-5,5,15,19,21,30-hexamethylspiro[4,25,29-trioxatricyclo[24.3.1.03,7]triaconta-8,22-diene-28,2'-oxane]-24-one