On the other hand, the melting point of C22GL ( ) on the first heating was the same as that of the type II crystal. We speculate that this is because no special crystallization operation was performed after the column purification during the synthesis of C22GL ( ), and therefore it did not become type III crystal. The lamellar structure observed in the XRD analysis was found to be derived from type III crystals. We also speculate that C22GL (6) was a type II crystal, which caused the broad XRD pattern. Thus, the C-GL series, in which fatty acids were introduced into all hydroxy groups, was found to have type I, type II, and type III crystal polymorphism.