label: 1,2-epoxy-3,4-dihydroxy-1,2,3,4-tetrahydrobenzo(c)phenanthrene, (1aalpha,2beta,3alpha,11dalpha)-(+-)-isomer
label_lc: 1,2-epoxy-3,4-dihydroxy-1,2,3,4-tetrahydrobenzo(c)phenanthrene, (1aalpha,2beta,3alpha,11dalpha)-(+-)-isomer