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The identification and three step synthesis of 3- O -protocatechuoylceanothic acid, a novel and natural GPR120 agonist, is described. This ceanothane-type triterpenoid was identified from the components of Ziziphus jujuba roots and was found to be a new GPR120 agonist with a novel structure. We synthetically converted ceanothic acid, which does not have GPR120 agonist activity, into 3- O -protocatechuoylceanothic acid in three steps. In addition, we present the corrected NMR spectrum of 3- O -protocatechuoylceanothic acid based on our synthesis.

Identification and Semi-Synthesis of 3-O-Protocatechuoylceanothic Acid, a Novel and Natural GPR120 Agonist †