1-(4-Pyridinyl)-3,4-dihydro-beta-carboline 28717-24-0 3H-Pyrido(3,4-b)indole, 4,9-dihydro-1-(4-pyridinyl)- 4,9-Dihydro-1-(4-pyridinyl)-3H-pyrido(3,4-b)indole 5-26-02-00540 (Beilstein Handbook Reference) BRN 0617406