Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups , , or

Classification Context

Section:

CHEMISTRY; METALLURGY

Class:

ORGANIC CHEMISTRY

Subclass:

HETEROCYCLIC COMPOUNDS

Child Classifications

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• C07D 491/02 in which the condensed system contains two hetero rings
• C07D 491/12 in which the condensed system contains three hetero rings
• C07D 491/22 in which the condensed system contains four or more hetero rings