Rubiginone B2

(+)-Rubiginone B2

(S)-3,4-Dihydro-8-methoxy-3β-methylbenz[a]anthracene-1,7,12(2H)-trione

(3S)-3β-Methyl-8-methoxy-1,2,3,4,7,12-hexahydrobenzo[a]anthracene-1,7,12-trione