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发明人赵玉洁,陈志强,钱学锋. "Method for the Synthesis of Levocetirizine Impurity 55" [P]. 中国发明专利, 专利号 CN 109396155 B, 授权公告日 2020-11-15.
发明人孙丽萍,郭海燕,张德明. "A Process for Preparing High-Purity Levocetirizine Impurity 55" [P]. 中国发明专利, 专利号 CN 116500534 B, 授权公告日 2025-02-18.
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