发明人沈红梅,罗永刚,马晓峰. "Method for the Synthesis of 3-Ethyl-1,1,2-trimethyl-8-sulfo-1H-benzo[e]indol-3-ium-6-sulfonate" [P]. 中国发明专利, 专利号 CN 117377907 B, 授权公告日 2016-12-25.
发明人孙丽萍,钱学锋,王建平. "A Process for Preparing High-Purity 3-Ethyl-1,1,2-trimethyl-8-sulfo-1H-benzo[e]indol-3-ium-6-sulfonate" [P]. 中国发明专利, 专利号 CN 117476977 B, 授权公告日 2016-02-24.
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