The classes currently available are insulin and insulin analogues for type-1/type-2 diabetes [23], sulfonylureas [24,25], glinides [22], biguinides [26,27], glitazones (thiazolidine diones) [28], and α–glycosidase inhibitors for type-2 diabetes (T2D) [29]. Here, INS is linked to type 2 diabetes mellitus.