1,4-diazines Patents (Class 544/336)
- Heptacyclo ring system having the diazine ring as one of the cyclos (e.g., indanthrones, etc.) (Class 544/339)
- Pentacyclo ring system having the diazine ring as one of the cyclos (Class 544/342)
- Tetracyclo ring system having the diazine ring as one of the cyclos (e.g., benzophenazines, etc.) (Class 544/343)
- Tricyclo ring system having the diazine ring as one of the cyclos (Class 544/344)
- Bicyclo ring system having the diazine ring as one of the cyclos (Class 544/349)
- Additional hetero ring containing (Class 544/359)
- Six-membered ring consisting of one nitrogen and five carbons (e.g., pyridine, etc.) (Class 544/360)
- The additional six-membered hetero ring is one of the cyclos in a polycyclo ring system (Class 544/361)
- At least three hetero rings containing (Class 544/364)
- Having -C(=X)-, wherein X is chalcogen, bonded directly to ring carbon of the additional six-membered hetero ring (e.g., nicotinic acid, etc.) (Class 544/365)
- Five-membered hetero ring having two or more ring hetero atoms of which at least one is nitrogen (Class 544/366)
- Five-membered hetero ring consisting of one nitrogen and four carbons (Class 544/372)
- Ring chalcogen in the additional hetero ring (Class 544/374)
- Polycyclo-carbocyclic ring system having at least three cyclos (Class 544/380)
- Nitrogen attached directly to the piperazine ring by nonionic bonding (Class 544/382)
- Chalcogen attached directly to piperazine ring nitrogen by nonionic bonding (Class 544/383)
- Chalcogen bonded directly to piperazine ring carbon (Class 544/384)
- Having -C(=X)-, wherein X is chalcogen, bonded directly to the piperazine ring (Class 544/386)
- Plural -C(=X)- groups bonded directly to the piperazine ring (Class 544/387)
- The -C(=X)- is part of a -C(=X)X- group, wherein the X's are the same or diverse chalcogens (Class 544/389)
- Halogen or acyclic nitrogen bonded directly to the -C(=X)- group (Class 544/390)
- Carbocyclic ring containing (Class 544/391)
- Phenyl or naphthyl bonded directly to ring nitrogen of the piperazine ring (Class 544/392)
- Acyclic nitrogen bonded directly to a -C(=X)- group, wherein X is chalcogen (Class 544/393)
- The other ring nitrogen has a substituent which includes chalcogen single bonded to acyclic carbon (Class 544/394)
- The other ring nitrogen is unsubstituted or alkyl substituted only, or salt thereof (Class 544/395)
- Plural carbocyclic rings bonded directly to the same acyclic carbon (Class 544/396)
- Chalcogen attached indirectly to the piperazine ring by nonionic bonding (Class 544/398)
- Nitrogen attached indirectly to the piperazine ring by nonionic bonding (Class 544/402)
- Carbocyclic ring containing (Class 544/403)
- N-hydrocarbyl piperazines (Class 544/404)