DIFF Subgroup
C12P 17/185 Full Title
Preparation of heterocyclic carbon compounds with only O, N, S, Se or Te as ring hetero atoms (C12P13/04 - C12P13/24 take precedence) > containing at least two hetero rings condensed among themselves or condensed with a common carbocyclic ring system, e.g. rifamycin
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.