苝-3,10-二酮

5-methylbenzo[a]anthracene-7,12-dione

1,3,6,8-tetrahydro-2,4,5,7-pyrimido<5,4-g>pteridinetetrone

[(E)-but-2-en-2-yl]cyclopropane

but-1-en-2-ylcyclopropane