3、Province.Theirchemicalstructureswereelucidatedas1-β-hydroxybaccatinⅠ(Ⅰ);10-deacetyltaxol(Ⅱ);and7,9-dideacetylbaccatinⅥ(Ⅲ)by1HNMR,13CNMR,EIandFABMSaswellasDEPTspectrum.ThesecompoundswereisolatedfromT.yunnanensiChengetL.K.FuforthefirsttimeeventhoughtheyalsoexistedinotherspeciesofTaxusL. Ke