Structure of Methyl Adenophorate and Triphyllol, Triterpenoids of Adenophora triphylla var. japonica Roots

From the crude drug "shajin", the roots of Adenophora triphylla var. japonica, two novel triterpenoids, methyl adenophorate and triphyllol, have been isolated and these structures have been determined as those represented by formula I and II, respectively, on the basis of chemical and physical evidence.