71013-32-6 Azuleno(6,5-b)furan-2,5-dione, 4,4a,7a,8,9,9a-hexahydro-4-hydroxy-3-(hydroxymethyl)-4a,8-dimethyl-, (4S-(4alpha,4abeta,7aalpha,8alpha,9aalpha))- Isohelenol