Synonyms:
1,3-diazaspiro[4.4]non-1-en-4-one ; 151257-01-1 ; 4]non-1-en-4-one hcl ; 2-n-butyl-1 ; 2-butyl-1,3-diaza-spiro[4,4]no ; 2-butyl-, hydrochloride ; 3-diaza-spiro[4 ; 2-butyl-1,3-diazaspiro-[4-4] no-1-one hcl ; [138402-05-8], c11h18n2o,194.14 ; irbesartan lactam impurity