Swainsoine was detected in Astragalus variahills Bunge (yellow flower) when tested by TLC in its extraction in three parts, and was mainly in Ethyl acetate and n-Rutanol.

• 对三段萃取物的TLC检查发现，黄花变异黄芪中含有苦马豆素，且主要存在于乙酸乙酯萃取部分和正丁醇萃取部分。