C CHEMISTRY; METALLURGY
C07 ORGANIC CHEMISTRY
C07F ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
C07F9/00 Compounds containing elements of Groups 5 or 15 of the Periodic Table
C07F9/02 Phosphorus compounds