Cyclopentadiene

[Jason Yan]

An [hydrocarbon] compound that is basically violating being a hydrocarbon. Its [pKa] value is only 16, making it as [acidic] as water.
Its structure is a cyclopentane ring with 2 double bonds.

[Couch Potatoe]

A colorless toxic liquid derived from the distillation of coal tar, insoluble in water, soluble in alcohol, and used in the manufacture of insecticides and resins.