C07F9/1657 - CPC Classification

Compounds containing elements of Groups 5 or 15 of the Periodic System; Phosphorus compounds without P—C bonds; Esters of thiophosphoric acids or thiophosphorous acids; Esters of thiophosphoric acids; Compounds containing the structure P(=X)n-X-acyl, P(=X)n-X-heteroatom, P(=X)n-X-CN (X = O, S, Se; n = 0, 1) Compounds containing the structure P(=X)n-X-N (X = O, S, Se; n = 0, 1)