Williams B T, O'Brien P Q, Thompson G K. "Method for the Synthesis of 7'-Bromo-4'-hydroxyspiro[cyclobutane-1,2'-thiochromane] 1',1'-dioxide" [P]. US Patent, US 10629424 B2, 2025-03-12.
发明人冯建国,胡光,马晓峰. "A Process for Preparing High-Purity 7'-Bromo-4'-hydroxyspiro[cyclobutane-1,2'-thiochromane] 1',1'-dioxide" [P]. 中国发明专利, 专利号 CN 110400173 A, 授权公告日 2023-06-25.
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