51805-84-6 BENZ(a)AZULEN-6,9-IMIN-10-OL, 4b,5,6,7,8,9,9a,10-OCTAHYDRO-11-METHYL-, ACETATE ( Benz(a)azulen-6,9-imin-10-ol, 4b,5,6,7,8,9,9a,10-octahydro-11-methyl-, acetate (ester), methanesulfonate (salt), (4bS-(4b-alpha,6-beta,9-beta,9a-alpha,10-beta))-