(organic chemistry) A polyoxygenated steroid present in the coral Isis hippuris

(organic chemistry) The spirocyclic compound [(1R,2S,3S,6S,8R,11S,12S,13S,15R,17R,20S,21R)-2',2',3',11,17-pentamethylspiro[14,16,19-trioxaheptacyclo[11.8.1.1^(2,20).0^(1,15).0^(3,12).0^(6,11).0^(17,21)]tricosane-18,5'-oxolane]-8-yl] acetate