javanicin A

(1S)-1,2,3,3aβ,6aβ,7,7aα,11a,11bα,11c-Decahydro-1α-hydroxy-3α,11aβ,11cβ-trimethyl-2β,10-dimethoxyphenanthro[10,1-bc]pyran-5,11(4H,8H)-dione