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生长于地中海克里特岛的半日花科植物Ｃｉｓｔｕｓｃｒｅｔｉｃｕｓ ｓｕｂｓｐ．ｃｒｅｔｉｃｕｓ（Ｌ．）亚种为一种多年生灌木，其茎叶常于夏季分泌出一种树脂状物，当地人称之谓“Ｌａｄａｎｏ”，作为香料和民间用药。作者从中分得９种劳丹烷型（ｌａｂｄａｎｅ）二萜类?
Half-day flowering plant Cistuscreticus subsp. growing in Mediterranean Crete. The creticus (L.) subspecies is a type of perennial shrub whose stems and leaves often secrete a resinous material during the summer. The locals call it “Ladano” as a spice and folk medicine. Did the author derive nine types of labdane diterpenoids?