Study on the tetracyclic diterpenoids 4.The solvolysis of methyl 14-β-mesyloxy-ent-kaur-15-en-19-oate
Study on the tetracyclic diterpenoids 4.The solvolysis of methyl 14-β-mesyloxy-ent-kaur-15-en-19-oate
摘要
Grandiflorenic acid(1),possessing potent contragestational activity,is an ent-kauranediterpenoid.It has been isolated from Mexical medicinal plant zoapatle(Montanoa tomento)In connection with our synthetic work on ent-kaurane diterpenoids,we are interested in theconversion of stevioside(2)occurred abundantly in Stevia rebaudiana into grandiflorenic acid
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