The general class of carbon-containing compounds, usually based on carbon chains or rings, and also containing hydrogen (hydrocarbons), with or without nitrogen, oxygen, or other elements. The bonding between elements is generally covalent.
(=> (Organic-Chemical ?Self) (And (Exists (?A) (And (Prime-Component ?Self ?A) (Carbon ?A))) (Exists (?B) (And (Prime-Component ?Self ?B) (Hydrogen ?B)))))