(organic chemistry) any compound having the general formula RC(=NOH)NO₂

(biochemistry) a C₂₀ fatty acid, containing a cyclopentane ring, that is the basis of the prostaglandins

(chemistry) any compound of general formula RSe(=O)OH

(chemistry) HSeCN, the selenium analogue of cyanic acid.

(chemistry) any compound of general formula RSe-OOH

(chemistry) any compound of general formula RSe(=O)₂OH.

(organic chemistry) The monoamide of oxalic acid H₂NC(=O)C(=O)OH; any derivative of this compound

(chemistry) a condensation product of phosphoric acid, H₅P₃O₁₀, known from its salts and esters

(chemistry) a nitro substituted di-phenol, 2,4,6-trinitrobenzene-1,3-diol, used in the manufacture of dyes, explosives etc

(inorganic chemistry) pyrophosphoric acid