Quinazoline (including Hydrogenated)(i.e., The Second Cyclo In The Bicyclo Ring System Is An Ortho-fused Six-membered Carbocycle) Patents (Class 514/266.1)
- The additional hetero ring is six-membered consisting of one nitrogen and five carbons (Class 514/266.21)
- The additional hetero ring is five-membered consisting of carbon and plural nitrogens as the only ring members (Class 514/266.23)
- The additional hetero ring consists of carbon and chalcogen as the only ring members (Class 514/266.24)