Alternapyrone
Ambuic acid
(+)-Ambuic acid
Aquastatin A
N-Acetylmuramic acid
(+)-N-Acetylmuramic acid
Allantoin
(±)-Allantoin, 1-(2,5-Dioxoimidazolidin-4-yl)urea, 5-Ureidohydantoin, Allantion, Allantol, Cordianine, DL-Allantoin, Glyoxyldiureid, Glyoxyldiureide, Glyoxylic diureide, NSC 7606, Psoralon, SD 101, Sebical, Septalan
Alloxazine
2,4-Dioxobenzo[g]pteridine, 6,7-Benzolumazine, Benzo[g]pteridine-2,4(3H,10H)-dione, Flavoquinone, Isoalloxazine, NSC 203056, NSC 402746
Acadesine
5-Aminoimidazole-4-carboxamide 1-β-D-ribofuranoside, AIC-Riboside, AICA-Riboside, AICAr, Acadra, Arasine, GP 1-110, NSC 105823
5-Aminoimidazole-4-carboxamide
7-Aminocephalosporanic acid
7-ACA, 7-ACS, 7β-Amino-3-acetoxymethylcephemcarboxylic acid, 7β-Aminocephalosporanic acid