Figure 1
From: Synthesis and mechanisms of action of novel harmine derivatives as potential antitumor agents

Chemical structures of harmine-based molecules and synthesis scheme of new compounds.
(A) The structures of harmine and the representative reported (1-(4-nitrostyryl)-7-methoxy-β-carboline and JKA97) and newly synthesized (3c) benzenlidene substituted β-carbolines. (B) Reagents and conditions for the synthesis of compounds: (i) Acetic anhydride, R1CHO, reflux; (ii) ethyl acetate/benzyl bromide, reflux.