139006-37-4 2H-1-Benzopyran-3-ol, 2-(3,4-dimethoxyphenyl)-3,4-dihydro-4,4,7-trimethoxy-, (2R,3S)-rel-

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139006-37-4 2H-1-Benzopyran-3-ol, 2-(3,4-dimethoxyphenyl)-3,4-dihydro-4,4,7-trimethoxy-, (2R,3S)-rel- - 化工 AI 网