Provided herein are compounds, including those of the Formula II in which n is an integer equal to or greater than 1; R2, is selected from hydrogen and optionally substituted alkyl that is saturated or unsaturated, and branched or unbranched; and R3, and R4, independently for each occurrence, are selected from optionally substituted alkyl that is saturated or unsaturated, and branched or unbranched. Also provided are compositions containing such compounds and methods of making both compounds and compositions thereof.