(4aS-cis)-3,4a,5,12b-Tetrahydro-8,10-dihydroxy-2,5,5,9-tetramethyl-4H-benzo(d)naphtho(2,3-b)pyran-7,12-dione 128505-88-4 4H-Benzo(d)naphtho(2,3-b)pyran-7,12-dione, 3,4a,5,12b-tetrahydro-8,10-dihydroxy-2,5,5,9-tetramethyl- Naphterpin