In the course of our program directed toward the design and synthesis of inhibitors of folate- dependent biochemical processes as antitumor agents, l we recently synthesized N-{4-[2-(2- amino-4 (3H)-oxo-7H-pyrrolo [2, 3-dlpyri-midin-5-yl) ethyl] benzoyl}-~-glutamic acid (1, LY231514I2 as an analogue of DDATHF [(6RS)-211, 3 in which C-5 of the latter was deleted and the B ring aromatized. This compound, which was found to be a potent inhibitor of ...