72103-58-3 Bufa-20,22-dienolide, 3-((7-(((1S)-4-((aminoiminomethyl)amino)-1-carboxybutyl)amino)-1,7-dioxoheptyl)oxy)-14,15-epoxy-5-hydroxy-, (3beta,5beta,15beta)- Marinobufagin 3-pimeloylarginine ester