Retained functional parent names

Structural formula	Functional parent name	Systematic name	ChEBI
Hydrocarbons
HC≡CH	acetylene	ethyne	CHEBI:27518
H2C=C=CH2	allene	propa-1,2-diene	CHEBI:37601
C6H5–CH3	toluene *	methylbenzene	CHEBI:17578
C6H5–CH=CH2	styrene *	ethenylbenzene	CHEBI:27452
Alcohols
C6H5–OH	phenol	benzenol	CHEBI:15882
Ethers
C6H5–O–CH3	anisole *	methoxybenzene	CHEBI:16579
Ketones and pseudoketones
H3C–CO–CH3	acetone	propan-2-one	CHEBI:15347
H2C=C=O	ketene	ethenone	CHEBI:48003
	chalcone	(2E)-1,3-diphenylprop-2-en-1-one	CHEBI:48965
	2-pyrrolidone	pyrrolidin-2-one	CHEBI:36592
	1,2-benzoquinone	cyclohexa-3,5-diene-1,2-dione	CHEBI:17253
	1,4-benzoquinone	cyclohexa-2,5-diene-1,4-dione	CHEBI:16509
	1,2-naphthoquinone	naphthalene-1,2-dione	CHEBI:34055
	1,4-naphthoquinone	naphthalene-1,4-dione	CHEBI:27418
	2-quinolone	quinolin-2(1H)-one	CHEBI:18289
	4-quinolone	quinolin-4(1H)-one	CHEBI:155900
	1-isoquinolone	isoquinolin-1(2H)-one	CHEBI:18350
	9,10-anthraquinone	anthracene-9,10-dione	CHEBI:40448
Carboxylic acids
H3C–COOH	acetic acid	ethanoic acid	CHEBI:15366
H2C=CH–COOH	acrylic acid	prop-2-enoic acid	CHEBI:18308
C6H5–COOH	benzoic acid	benzenecarboxylic acid	CHEBI:30746
H2N–COOH	carbamic acid	aminomethanoic acid	CHEBI:28616
H2N–CO–COOH	oxamic acid	2-amino-2-oxoethanoic acid	CHEBI:18058
Dicarboxylic acids
HOOC–COOH	oxalic acid	ethanedioic acid	CHEBI:16995
HOOC–CH2–COOH	malonic acid	propanedioic acid	CHEBI:30794
HOOC–CH2–CH2–COOH	succinic acid	butanedioic acid	CHEBI:15741
	phthalic acid	benzene-1,2-dicarboxylic acid	CHEBI:29069
	isophthalic acid	benzene-1,3-dicarboxylic acid	CHEBI:30802
	terephthalic acid	benzene-1,4-dicarboxylic acid	CHEBI:15702
Amines and amides
C6H5–NH2	aniline	benzenamine	CHEBI:17296
H2N–NH2	hydrazine	diazane	CHEBI:15571
H2N–C(=NH)–NH2	guanidine	iminomethanediamine	CHEBI:42820
H2N–CO–NH2	urea	carbonyl diamide	CHEBI:16199

* Substitution in ring only.