2019年,研究人员发表测试的结果他们运行在一些剩下的球的原始印度黄色素,确定马尿酸的存在,“反刍尿液代谢物中发现。”The researchers concluded: "the examination of authentic relics in the Economic Botany Collection at the Royal Botanic Gardens, Kew from T.N. Mukharji's investigation of Indian yellow supports the veracity of his report regarding the manufacture of Indian yellow."