120312-86-9

(1'R,5a'S,8R,8a'S,9a'R)-1'-hydroxy-1',4,4,8',8'-pentamethyl-8a',9'-dihydro-1'H,4H,8'H,10'H-spiro[1,4-dioxepino[2,3-g]indole-8,7'-[5a,9a](epiminomethano)cyclopenta[f]indolizine]-3',9,10'(2'H,10H)-trione - ethane (1:1)