1,3-diazoles Patents (Class 514/385)
- Polycyclo ring system having the diazole ring as one of the cyclos (Class 514/387)
- Divalent chalcogen or acyclic nitrogen double bonded directly at both 2- and 4- positions, or tautomeric equivalent (e.g., hydantoin, etc.) (Class 514/389)
- Divalent chalcogen or acyclic nitrogen double bonded at 2-position, or tautomeric equivalent (Class 514/392)