Thompson G K, Roberts E F, Lee S K. "Method for the Synthesis of (S)-6-isobutyl-2-oxa-5,8-diazaspiro[3.5]Nonan-7-one" [P]. US Patent, US 11838833 B2, 2020-10-16.
发明人孙丽萍,张德明,何建平. "A Process for Preparing High-Purity (S)-6-isobutyl-2-oxa-5,8-diazaspiro[3.5]Nonan-7-one" [P]. 中国发明专利, 专利号 CN 108829550 B, 授权公告日 2017-10-23.
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