Saponin Quil-A and its monomer component were extracted from the bark of the south american Quillaja Saponaria Monila.

• 皂甙 Quil A及其单体成分是南美奎拉雅属皂树皮提取物。 研究发现其能够与细胞膜上的胆固醇形成复合物 ,是抗原强有力的佐剂。