Diazoxide is a benzothiadiazine derivative, structurally related to the thiazide diuretics. Among the given options, chlorothiazide is also a thiazide diuretic and shares a similar benzothiadiazine ring system with diazoxide. Furosemide is a loop diuretic, spironolactone is an aldosterone antagonist, and acetazolamide is a carbonic anhydrase inhibitor; these belong to different structural classes.