…There are two structural isomers, α-pyrone and γ-pyrone, depending on the position of the carbonyl group. α-pyrone is also called coumarin and is a type of lactone. It has a melting point of 5°C and a boiling point of 206-207°C. … *Some of the terminology explanations that mention "coumalin" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…カルボニル基の位置によってα‐ピロンとγ‐ピロンの2種の構造異性体がある。α‐ピロンはクマリンcoumalinともいい,一種のラクトンである。融点5℃,沸点206~207℃。… ※「coumalin」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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