Organic chemistryZ 0200 DOI: 10.1002/chin.201207231

Six-Membered Rings with One Oxygen: Pyrylium Ion, Related Systems and Ben-zo Derivatives — [200 refs.]. — (SANTAMARIA, J.; VALDES, C.; Mod. Heterocycl. Chem. 3 (2011) 1631-1682 ; Inst. Univ. Quim. Organomet. "Enrique Moles", Univ. Oviedo, E-33006 Oviedo, Spain; Eng.) — Lindner

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