... Pharm. Bull] 31( 7 )2302—2307(1983) Bitter Principles of Pertya glabrescens: Two Sesquiterpene Glucosides SEIJI NAGUMO,“ MASAHIRO NAGAI,*'b and TAKAO INOUE“ Faculty of ... 620 mg), which was desalted by the same procedure as used for I. The chemical structure of ...