4-hydroxy-5-hydroxymethyl-(1,3)dioxolan-2,6'-spirane-5',6',7',8'-tetrahydro-indolizine-3'-carbaldehyde
4-hydroxy-5-hydroxymethyl-(1,3)dioxolan-2,6'-spirane-5',6',7',8'-tetrahydro-indolizine-3'-carbaldehyde