470-42-8 5.beta.-Bufa-20,22-dienolide, 14,15.beta.-epoxy-3.beta.,5-dihydroxy- Bufa-20,22-dienolide, 14,15-epoxy-3,5-dihydroxy-, (3.beta.,5.beta.,15.beta.)- MARCINOBUFAGIN Marinobufagin Marinobufogenin NSC234205