(biochemistry) any monosaccharide, having both a keto group and a carboxylic acid group, that is in equilibrium with a hemiacetal structure

(obsolete, chemistry) uric acid

(biochemistry) A crystalline acid which was discovered in milk and is a growth factor for various microorganisms (as Lactobacillus bulgaricus) and an intermediate in pyrimidine biosynthesis; uracil-6-carboxylic acid, C₅H₄N₂O₄.

(chemistry) the hydrated form of molybdenum trioxide, H₂MoO₄

(chemistry) The oxoacid H₂SeO₃; the selenium analogue of sulfurous acid.

(organic chemistry) A heterocyclic compound derived from pyrimidine that is the basis of all barbiturate drugs.

Alternative spelling of hydrosulfuric acid

(chemistry) hydrogen sulfide

(chemistry) The hypothetical compound Si(OH)₄; it is only known as the orthosilicate salts or esters.

(biochemistry) a nucleotide, inosine phosphate, found in muscle tissue