1,4-Piperazinediethanol alpha-methyl-1-naphthaleneacetate ester 2,2'-(1,4-Piperazindiyl)diethylbis(alpha-methyl-1-naphthalinacetat) 5051-16-1 5061-22-3 DA 914 EINECS 225-766-5 N,N'-Bis(2-(alpha-(1-naphthyl)propionyloxy)ethyl)piperazin Nafiverina [INN-Spanish] Nafiverine Nafiverine [INN] Nafiverinum [INN-Latin]