... Volume: Page: ... Finally, a third subclass (16b, 29, 30) is also active against FAS (IC 50 = ≤20 μg/mL), is cytotoxic to cancer cells (IC 50 ... Acid hydrolysis of 17k−l provided acids 18a (98%) and 18b (89%, Scheme 8). Coupling reactions of 18 with EDC, or tris(2,3 ...