Abutment 发表于 2025-3-30 09:26:27
Introduction,for a group of borderline compounds leaves very few compounds unclassified. A few otherwise impeccable alkaloids, such as rutaecarpine and ricinine, that have electron-withdrawing functional groups either adjacent to or conjugated with their nitrogen atoms, do not show the characteristic of basicity.龙卷风 发表于 2025-3-30 16:22:30
http://reply.papertrans.cn/103/10219/1021838/1021838_52.pngTIA742 发表于 2025-3-30 17:28:23
http://reply.papertrans.cn/103/10219/1021838/1021838_53.png白杨鱼 发表于 2025-3-30 21:44:11
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