Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen

Full Title

Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings > with only hydrogen or carbon atoms directly attached to the ring nitrogen atom > having one double bond between ring members or between a ring member and a non-ring member > with hetero atoms or with carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, directly attached to ring carbon atoms > Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen