132922-55-5 15,16-Diepxoylabdane-14-en-7-one Dispiro(furan-3(2H),2'(5'H)-furan-5',1''(2''H)-naphthalen)-3''(4''H)-one, 3',4',4''a,5'',6'',7'',8'',8''a-octahydro-2'',5'',5'',8''a-tetramethyl-, (1''R-(1''alpha(R*),2''alpha,4''aalpha,8''abeta))- LC 5504 Prehispanolone