(5E)-5-(bromomethylene)dihydro-2(3H)-furanone
(5E)-5-(bromo-methylene)-tetrahydro-furan-2-one (5E)-5-(bromomethylene)tetrahydrofuran-2-one (5E)-5-(bromomethylidene)oxolan-2-one
(5E)-5-(brommethyliden)oxolan-2-on (5E)-5-(bromométhylidène)oxolan-2-one (5E)-5-(ブロモメチリデン)オキソラン-2-オン
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