恩!是论文中的一句,你帮我看看吧!我全打上去
the air-dired material was crushed and extracted tith hexane in a Soxhlet apparatus for 12hr. The extract was defatted and, after dissolving in Et2o, was extracted with NaOH solns giving 1000g of a neutral fraction and 800 of an acid one.
就这些吧 !是关于倍半萜类提取的!