2-methoxy-14-methyl-5,6-dihydro-3H-5,11b-(epiminoethano)phenanthro[2,3-d][1,3]dioxol-3-one 3H-5,11b-(iminoethano)phenanthro[2,3-d][1,3]dioxol-3-one, 5,6-dihydro-2-methoxy-14-methyl-, (11bS)- InChI=1/C19H19NO4/c1-20-4-3-19-9-18(22-2)15(21)7-13(19)14(20)5-11-6-16-17(8-12(11)19)24-10-23-16/h6-9,14H,3-5,10H2,1-2H3/t14?,19-/m0/s