Additional Hetero Ring Containing Patents (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)