发明人李文辉,周伟,何建平. "Method for the Synthesis of S 421" [P]. 中国发明专利, 专利号 CN 117438955 A, 授权公告日 2019-08-11.
发明人周伟,钱学锋,林芳. "A Process for Preparing High-Purity S 421" [P]. 中国发明专利, 专利号 CN 117759454 B, 授权公告日 2015-08-02.
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