(1''S-(1''R*,2''S*,3''aS*,3''bR*,5''R*,8''R*,11''R*,14 ''R*,16''S*,18''S*,19''aR*,20''aR*,21''aS*,23''S*(3'aR*,5'S*,(4R*,4aR*,6S*,7S*,8aR*),7'R*,7'aR*),24''aS*,25''aR*,26''R*,26''aS*,30''S*,31''aR*,32''R*,33''aS*))-Tetracontahydro-7-hydroxy-6-(4-hydroxy-2-oxobutyl)-4,7',16'',26''-tetramethyl-10'',17''-bis(methylene)dispiro(pyrano(3,2-b)pyran-2(3H),5'-(5H)furo(3,2-b)pyran-2'(3'H),23''(6''H)-(1,5:8,11:14,18)triepoxy(30,32)ethano(2,5)methano(2H,5H,28H)furo(2',3':5,6)pyrano(4,3-b)furo(2'',3'':5',6')pyrano(2',3':5,6)pyrano(3,2-i)(1,4,8)trioxacyclopentacosin)-28''-one 157078-48-3 Dispiro(pyrano(3,2-b)pyran-2(3H),5'(5H)furo(3,2-b)pyran-2'(3'H),23''(6''H)-(1,5:8,11:14,18)triepoxy(30,32)ethano(2,5)methano(2H,5H,28H)furo(2',3':5,6)pyrano(4,3-b)furo(2'',3'':5',6')pyrano(2',3':5,6)pyrano(3,2-i)(1,4,8)trioxacyclopentacosin)-28''-one, tetracontahydro-7-hydroxy-6-(4-hydroxy-2-oxobutyl)-4,7',16'',26''-tetramethyl-10'',17''-bis(methylene)-, (1''S-(1''R*,2''S*,3''aS*,3''bR*,5''R*,8''R*,11''R*,14''R*,16''S*,18''S*,19''aR*,20''aR*,21''aS*,23''S*(3'aR*,5'S*,4R*,4aR*,6S*,7S*,8aR*),7'R*,7'aR*),24''aS*,25''aR*,26''R*,26''aS*,30''S*,31''aR*,32''R*,33''aS*))- Ihb cpd Isohomohalichondrin B