1,3-Cyclobutanedicarboxylic acid, 2,4-bis(4-hydroxyphenyl)-, bis((hexahydro-1H-pyrrolizin-1-yl)methyl) ester, (1alpha(1R*,7aR*),2alpha,3beta(1R*,7aR*),4beta)-(+)- 528-37-0 Bis((hexahydro-1H-pyrrolizin-1-yl)methyl) 2,4-bis(4-hydroxyphenyl)-1,3-cyclobutanedicarboxylate (1alpha(1R*,7aR*),2alpha,3beta(1R*,7aR*),4beta)-(+)- Thesin Thesine