4H-cyclopenta[a][1,3]dioxolo[4,5-h]pyrrolo[2,1-b][3]benzazepin-1-ol, 1,5,6,8,9,14b-hexahydro-2-methoxy-, 7-oxide, (1S,7S,14bS)- Cephalotaxine alpha-N-oxide InChI=1/C18H21NO5/c1-22-15-9-18-4-2-5-19(18,21)6-3-11-7-13-14(24-10-23-13)8-12(11)16(18)17(15)20/h7-9,16-17,20H,2-6,10H2,1H3/t16-,17-,18?,19+/m1/s rel-(1R,7R,14bR)-2-methoxy-1,5,6,8,9,14b-hexahydro-4H-cyclopenta[a][1,3]dioxolo[4,5-h]pyrrolo[2,1-b][3]benzazepin-1-ol 7-oxide