neoarsphenamine

noun
neo·​ars·​phen·​a·​mine | \ ˌnē-ō-ärs-ˈfen-ə-ˌmēn How to pronounce neoarsphenamine (audio) \

Medical Definition of neoarsphenamine

: a yellow powder C13H13As2N2NaO4S similar to arsphenamine in structure and use

called also neosalvarsan