label: organic fundamental parent
label_lc: organic fundamental parent
description: "An organic fundamental parent is a structure used as a basis for substitutive names in organic nomenclature, containing, in addition to one or more hydrogen atoms, a single atom of an element, a number of atoms (alike or different) linked together to form an unbranched chain, a monocyclic or polycyclic ring system, or a ring assembly or ring/chain system."