Description: 540 organic compounds -- part of the class 532-570 series / 540 organic compounds -- part of the class 532-570 series/() organic compounds (class 532, subclass 1) (1) heterocyclic carbon compounds containing a hetero ring having chalcogen (i.e., oxygen, sulfur, selenium or tellurium) or nitrogen as the only ring hetero atoms (450) the hetero ring contains at least eight members including nitrogen and carbon (451) chalcogen double bonded directly to a ring carbon of the hetero ring which is adjacent to the ring nitrogen (e.g., laurolactam, etc.) (460) plural nitrogens in the hetero ring
Hierarchy/Derived subclasses
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