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Pyran - Wikipedia
吡喃 - 百度百科
吡喃 - 维基百科,自由的百科全书
吡喃 - 維基百科,自由的百科全書
芘(有机化合物)_百度百科
2H-Pyran, 3,4-dihydro- - NIST Chemistry WebBook
2H-Pyran, 3,4-dihydro- - NIST Chemistry WebBook
Pyrans: Heterocycles of chemical and biological interest
Emergence of 2-Pyrone and Its Derivatives, from Synthesis to Biological ...
2-Pyrone – A Privileged Heterocycle and Widespread Motif in …