Table 1. ¹³C Isotopomeric Products Observed during MCE Using Different ¹³C Isotopomers of 1.

13C isotopomer of 1	13C isotopomeric products
	formate (5)	d-arabinose (4)	d-gluconate (2)	d-mannonate (3)
1-13C	13C	1-13C	2-13C	2-13C
2-13C	13C	unlabeled	1-13C	1-13C
4-13C	nda	3-13C	4-13C	4-13C
1,2-13C2	13C	1-13C	1,2-13C2	1,2-13C2
1,3-13C2	13C	1,2-13C2	2,3-13C2	2,3-13C2
2,3-13C2	13C	2-13C	1,3-13C2	1,3-13C2

^and = not detected.