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 (121) azaporphyrins (122) phthalocyanines (123) hetero ring attached directly or indirectly to the phthalocyanine ring system by nonionic bonding (124) the hetero ring is six-membered having nitrogen as a ring member (125) plural hetero atoms in the six-membered hetero ring (126) triazines (including hydrogenated)
Hierarchy/Derived subclasses
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