pentylidenecyclopropane

2-butyl-4,4-dimethyl-1,3-dioxane

3-chloro-4-pentanoylnaphthalene-1,2-dione

3-bromo-4-pentanoylnaphthalene-1,2-dione

1-(3,4-dihydroxynaphthalen-2-yl)pentan-1-one