4-methoxy-1-vinyl-9H-beta-carbolin-8-ol 9H-pyrido[3,4-b]indol-8-ol, 1-ethenyl-4-methoxy- InChI=1/C14H12N2O2/c1-3-9-14-12(11(18-2)7-15-9)8-5-4-6-10(17)13(8)16-14/h3-7,16-17H,1H2,2H