Description: 546 organic compounds -- part of the class 532-570 series / 546 organic compounds -- part of the class 532-570 series/() organic compounds (class 532, subclass 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 (class 540, subclass 1) (1) hetero ring is six-membered consisting of one nitrogen and five carbons (26) polycyclo ring system having the six-membered hetero ring as one of the cyclos (112) bicyclo ring system having the six-membered hetero ring as one of the cyclos (124) tropanes (including nor and dehydro forms) (127) chalcogen bonded directly to ring carbon of the tropane ring system (129) additional chalcogen attached directly or indirectly to the tropane ring system by nonionic bonding (130) three or more oxygens attached directly or indirectly to the tropane ring system by nonionic bonding
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