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北京石油化工学院2026年研究生招生接收调剂公告

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美丽的小姑娘

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[求助] 微谱求助，在线等，急！！已有1人参与

DL-9
溶剂：氯仿
碳谱数据如下：17.75,23.83,29.84,30.77,32.07,49.74,50.87,52.00,108.60,120.45,143.31,159.60,161.84,172.65

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