双乙烯酮

Spiro<3.5>nona-5,8-dien-2,7-dion

3-methylene-1-oxaspiro[3.5]nona-5,8-dien-7-one

7,9-dioxatrispiro[5.1.1.510.18.16]heptadeca-1,4,11,14-tetraene-3,13-dione

1,4-二溴-2,5-二(己氧基)苯