2,5-Dimethyl-1,2,3,4-tetrahydropyrimido(3,4-a)indole 22106-07-6 5-23-07-00369 (Beilstein Handbook Reference) BRN 0958553 Pyrimido(3,4-o)indole, 1,2,3,4-tetrahydro-2,5-dimethyl-