3,3'-(((Ethane-1,2-diylbis(oxy))bis(ethane-2,1-diyl))bis(oxy))bis(2-hydroxybenzaldehyde) 50mg

3,3'-(((Ethane-1,2-diylbis(oxy))bis(ethane-2,1-diyl))bis(oxy))bis(2-hydroxybenzaldehyde) 50mg