盘花垂头菊中两种新型倍半萜类化合物抑制人肝癌SMMC-7721细胞生长盤花垂頭菊中兩種新型倍半萜類化閤物抑製人肝癌SMMC-7721細胞生長 반화수두국중량충신형배반첩류화합물억제인간암SMMC-7721세포생장 INHIBITION OF NOVEL HIGHLY OXYGENATED BISABOLANCE SESQUITERPENE COMPOUNDS FROM CREMANTHODIUM DISCOIDEUM ON THE GROWTH OF HUMAN HEPATOMA CELL LINE SMMC-7721