TABLE 1.

Previously reported and currently proposed estimated rates of O-acetylation of corresponding sites in Fig. 1

	Previous study (15)		Current study
	9V	9A	9V	9A
R1	0.04a	0	0.004	0.005
R2	0.03	0	0.001	0.002
R3	0.25	0	0.55	0.61
R4	0.17	0	0.25	0.27
R5	0.06	0	0.09	0.03
R6	0.55	0	1.04	0
Sumb	1.1	0	1.95	0.92
OAc:NAcc	1.19:1	0:1	1.97:1	1.03:1

^a Values are expressed as molar equivalents.

^b Sum of all O-acetylation sites according to integration of resolved peaks in ¹H NMR spectra.

^c Molar ratio of O-acetate to N-acetate according to integration of acetate proton signals in ¹H NMR spectra.