... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > nitrogen molecular entity > ammonium compound > organoammonium salt > diphenhydramine hydrochloride

... > chemical entity > molecular entity > polyatomic entity > heteroatomic molecular entity > salt > organic salt > organic halide salt > organic chloride salt > hydrochloride > diphenhydramine hydrochloride

... > chemical entity > molecular entity > polyatomic entity > heteroatomic molecular entity > salt > halide salt > chloride salt > organic chloride salt > hydrochloride > diphenhydramine hydrochloride

... > chemical entity > molecular entity > polyatomic entity > heteroatomic molecular entity > halide > halide salt > chloride salt > organic chloride salt > hydrochloride > diphenhydramine hydrochloride

... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > halogen molecular entity > halide > halide salt > chloride salt > organic chloride salt > hydrochloride > diphenhydramine hydrochloride

... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > halogen molecular entity > chlorine molecular entity > chloride salt > organic chloride salt > hydrochloride > diphenhydramine hydrochloride