In 1999, Hecht and co-workers isolated mispyric acid (1), a structurally unique triterpene dicarboxylic acid with a novel skeleton, from stem bark of Australian plant Mischocarpus pyriformis as a DNA polymerase β inhibitor. 1 This structurally unique monocyclic triterpene is presumably derived via a new biogenetic pathway including direct coupling of two farnesyl units. 1 In continuation of our works on synthesis of DNA polymerase inhibitors 2 and biosynthetically unique ...