View source for Nomenclature of natural products

The '''nomenclature of natural products''' is a specialised part of [[chemical nomenclature]]. The term "[[natural product]]s" has a distinct meaning in "[[natural product chemistry]]": it does not usually include [[carbohydrate]]s, [[peptide]]s and [[protein]]s or [[nucleic acid]]s, which have their own specific nomenclatures. The three main groups of natural products are [[alkaloid]]s, [[steroid]]s, and [[terpene]]s and [[terpenoid]]s, although some natural products (e.g., many [[antibiotic]]s) fall out side these main classes.

==Fundamental parent structure==

==Nomenclature operations==
===Skeletal modifications===
;[[nor-]]: the removal of an unsubstituted skeletal atom (with its attached hydrogen atom(s), if any) from a ring or an acyclic portion of a fundamental parent structure.
;[[homo-]]: the addition of a methylene group between two skeletal atoms of a fundamental parent structure.
;[[cyclo-]]: the formation of an additional ring by means of a direct link between any two atoms of the fundamental parent structure.
;[[seco-]]: the cleavage of a ring bond (saturated or unsaturated) with the addition of the appropriate number of hydrogen atoms at each new terminal group so created.
;[[abeo-]]: the migration of one end of a single bond in the fundamental parent structure; the notation is X(Y&rarr;Z)-abeo-, where X is the locant that remains unchanged, Y is the locant of the other end of the single bond in the defined fundamental parent structure and Z is the locant of the end of the single bond in the modified structure.
;''[[retro-]]'': in [[carotenoid]] nomenclature, the migration by one position of all single and double bond in a conjugated system; the notation is X,Y-''retro''-, where X is the locant of the atom that has lost a hydrogen atom in the bond migration and Y is the locant of the atom which has gained a hydrogen atom.
;[[des-]]: the removal of a terminal ring from the defined fundamental parent structure, most commonly used in [[nomenclature of steroids|steroid nomenclature]].

===Replacement of skeletal atoms===

===Ring fusion===

===Changes in bond order===

===Substitution===

==Notes and references==
{{reflist|group=note}}

{{reflist}}

[[Category:Nomenclature of natural products|*]]
[[Category:Natural products]]
[[Category:Chemical nomenclature|Natural products]]

{{CC-BY-3.0}}