3H-naphtho[2,1,8-mna]xanthen-3-one, 5-methoxy- 5-Methoxy-6-oxa-benzo[def]chrysen-3-one 5-methoxy-3H-naphtho[2,1,8-mna]xanthen-3-one InChI=1/C20H12O3/c1-22-17-10-14-15(21)9-7-11-6-8-13-12-4-2-3-5-16(12)23-20(17)19(13)18(11)14/h2-10H,1H