di-tert-butyl (9,10-dioxo-9,10-dihydroanthracene-2,6-diyl)bis(tert-butoxycarbonylcarbamate)

di-t-butyl (anthracene-2,6-diyl)dicarbamate

10,11-二氢二苯并[a,b]环庚烯-5-酮

3,7-dinitro-10,11-dihydro-5H-dibenzo(a,d)cyclohepten-5-one