DIFF Subgroup
C07F 9/3804 Full Title
Compounds containing elements of Groups 5 or 15 of the Periodic Table > Phosphorus compounds (sugar phosphates C07H11/04; nucleotides C07H19/00, C07H21/00; nucleic acids C07H21/00) > with one or more P—C bonds > Phosphonic acids [RP(=O)(OH)2]; Thiophosphonic acids
Of 7 combined children, 0 exist in both systems.
7 codes are CPC-only extensions.