3,3'-Dihy-droxy-6,6'-bis-(hy-droxy-meth-yl)-2,2'-(pentane-1,1-di-yl)di-4H-pyran-4-one.

3,3'-Dihy-droxy-6,6'-bis-(hy-droxy-meth-yl)-2,2'-(pentane-1,1-di-yl)di-4H-pyran-4-one.