(3aS-(3aalpha,4beta,9alpha,9abeta))-3a,4,9,9a-Tetrahydro-9-(4-hydroxy-3,5-dimethoxyphenyl)-6,7-dimethoxy-4-((4-nitrophenyl)amino)naphtho(2,3-c)furan-1(3H)-one 138355-94-9