Pipe guineense alkaloids; Wisanine; Okolasin; amides of 5-(2-methoxy-4,5-methylenedioxy-phenyl)-2,4-pentadienoic acid; Horner-Wittig reaction; 1H-NMR-spectroscopy; antibacterial activity

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• Suzhou BEC Fine Chemicals Co., Ltd.

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• Shanghai Hohance Chemical Co., ltd

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