6-((9-chloro-6,7-dihydro-5H-benzo[7]annulen-8-yl)methylene)-6,7,8,9-tetrahydro-5H-benzo[7]annulen-5-one

spiro<(2-oxo-tetrahydrofuran)-5,3'-(1'-oxo-benzofuran)>

氢碘酸

硝酸