The resulting L-amide is selectively hydrolyzed by sequential use of dimsyl sodium (NaDMSO) and dilute acid to give bentiromide (4).
ðə ɹɪzˈʌltɪŋ ˈɛlɐmˈaɪd ɪz sᵻlˈɛktɪvli hˈaɪdɹəlˌaɪzd baɪ siːkwˈɛnʃəl jˈuːs ʌv dˈɪmzɪl sˈoʊdiəm nˈɑː dˌiːˌɛmˌɛsˈoʊ ænd daɪlˈuːt ˈæsɪd tə ɡˈɪv bˈɛntɪɹˌɑːmaɪd fˈoːɹ.