Trifluoro-methanesulfonic acid 7-oxo-4-trifluoromethanesulfonyloxy-cyclohepta-1,3,5-trienyl ester

甲醇钠

2-氯-2,4,6-环庚三烯-1-酮

endo-2-Methoxy-8-oxabicyclo[3.2.1]oct-6-en-3-on

7-(二羟基甲亚基)环庚并-3,5-二烯-1,2-二酮