1,2,3,3Abeta,4,6abeta,7,7aalpha,11,11a,11balpha,11c-dodecahydro-1beta,2alpha,11beta-trihydroxy-3alpha,8,11abeta,11cbeta-tetramethylphenanthro(10,1-bc)pyran-5,10-dione 4668-74-0 Phenanthro(10,1-bc)pyran-5,10-dione, 1,2,3,3abeta,4,6abeta,7,7aalpha,11,11a,11balpha,11c-dodecahydro-1beta,2alpha,11beta-trihydroxy-3alpha,8,11abeta,11cbeta-tetramethyl-