51868-65-6 BENZ(a)AZULEN-6,9-IMIN-10(4bH)-ONE, 5,6,7,8,9,9a-HEXAHYDRO-11-METHYL-, (4bR-(4b- Benz(a)azulen-6,9-imin-10(4bh)-one, 5,6,7,8,9,9a-hexahydro-11-methyl-, (4bR-(4b-alpha,6-beta,9-beta,9a-alpha))-