2-Butyl-1,3-diazaspiro[4.4]non-1-en-4-one Hydrochloride ;|2-Butyl-1,3-diazaspiro[4.4]non-1-en-4-one Hydrochloride;|2-Butyl-1,3-diazaspiro[4.4]non-1-ene-4-one Hydrochloride;|2-Butyl-4-spirocyclopentane-2-imidazolin-5-one hydrochloride ;|2-n-Butyl-1,3-diazaspiro[4.4]non-1-en-4-one Monohydrochloride|2-n-Butyl-1,3-diazaspiro[4.4]non-1-en-4-one Monohydrochloride;|Irbesartan Lactam Impurity ;|Irbesartan Lactam Impurity ; 2-Butyl-1,3-diazaspiro[4.4]non-1-en-4-one Hydrochloride ; 2-Butyl-4-spirocyclopentane-2-imidazolin-5-one hydrochloride