Clozapine's chemical class, among the following, is which?

• A. Dibenzoxazepine
• B. Dibenzodiazepine
• C. Dibenzothiazepine
• D. Benzisoxazole

Answer: (B)

Clozapine is classified by its core ring system as a dibenzodiazepine derivative. Its central structure features a seven-membered diazepine ring fused to two benzene rings, creating a dibenzodiazepine framework. This distinguishes it from options that would include oxygen (dibenzoxazepine), sulfur (dibenzothiazepine), or an isoxazole ring (benzisoxazole). The diazepine-based dibenzodiazepine core is the defining feature that makes this the correct chemical class.