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Published on: August 16, 2018
Four new trisnorlanostene-type triterpenoids from the stem bark of Pinus luchuensis
1Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan. wada@oysun01.oups.ac.jp
Abstract:
Four new 25,26,27-trisnorlanostene-type triterpenoids were isolated from the stem bark of Pinus luchuensis, together with five known compounds. These new compounds were characterized as 25,26, 27-trisnor-3 alpha-hydroxy-lanost-9(11)-en-24-oic acid (1), 25,26, 27-trisnor-3 alpha-methoxy-lanost-9(11)-en-24-oic acid (2), 25,26, 27-trisnor-3 beta-methoxy-lanost-9(11)-en-24-oic acid (3), and 25,26, 27-trisnor-3-oxo-lanost-9(11)-en-24-oic acid (4) on the basis of MS and NMR evidence.
