、 5-氟色胺 、 胡椒醛 、 三氟乙酸 以to give the title compound (2.34 g, 85%) as white crystals的产率得到1-(3,4-Methylenedioxyphenyl)-6-fluoro-2,3,4,9-tetrahydro-1H-beta-carboline
Carboline derivatives of formula (I) ##STR1## are potent and selective inhibitors of cyclic guanosine 3',5'-monophosphate specific phosphodiesterase (cGMP-specific PDE) and have utility in a variety of therapeutic areas where such inhibition is thought to be beneficial, including the treatment of cardiovascular disorders and erectile dysfunction.