Table 3.

MS spectrometric data and proposed structures for ester oligomers in compound 3

m/z [M+H]+	m/z [M+NH4]+	m/z [M-H] −	terminal groups	molecular weight (M)	chain-length combinations
637	654	not observed	CH3, CH3	636	12, 14, 14
665	682	not observed	CH3, CH3	664	14, 14, 14
681	--a	679	CH3, OH	680	14, 14, 14
693	710	not observed	CH3, CH3	692	14, 14, 16
709	--	707	CH3, OH	708	14, 14, 16
721	738	not observed	CH3, CH3	720	14, 16, 16
737	--	735	CH3, OH	736	14, 16, 16
749	766	not observed	CH3, CH3	748	16, 16, 16
765	--	763	CH3, OH	764	16, 16, 16
777	794	not observed	CH3, CH3	776	16, 16, 18 or 14, 18, 18
793	--	791	CH3, OH	792	16, 16, 18 or 14, 18, 18
805	822.7	not observed	CH3, CH3	804	16, 16, 18
821	--	819	CH3, OH	820	16, 18, 18
833	850 (weak)	not observed	CH3, CH3	832	18, 18, 18
849	--	847	CH3, OH	848	18, 18, 18

^aNot measured.