152273-11-5 Spiro(furan-3(2H),6'-(6H)naphtho(1,8-bc)furan)-2,2'(2'aH)-dione, 8'b-((acetyloxy)methyl)-5-(3-furanyl)decahydro-7'-methyl-, (2'aR-(2'aalpha,5'aalpha,6'beta(S*),7'beta,8'aalpha,8'bbeta))- Teuquadrin B