Terpenes U 0200 Isoeichlerianic Acid (Ia) from Aglaia silvestris and Revison of the Stereochemistry of Foveolin B. -The new triterpenoid (Ia) and its methyl ester (Ib) are isolated from the root bark extract. Careful comparison of the NMR data results in revision of the structure of forelin B to the (20R,24S)-isomer (Ic), previously reported to be (20S,24R). -(SEGER, C.; POINTINGER, S.; GREGER, H.; HOFER*, O.; Tetrahedron Lett. 49 (2008) 27, 4313-4315; Inst. Org. Chem., Univ. Wien, A-1090 Wien, Austria; Eng.) -Mais 42-182
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