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Table 2

Theoretical and experimental selected bond length (in angstrom) of 6 and 7.

Bond	6		7
	Theoretical length	Experimental length	Theoretical length	Experimental length
C1-O1	1.223	1.226	1.228	1.240
C1-C2	1.480	1.469	1.489	1.450
C2-C3	1.351	1.334	1.359	1.350
C3-C4	1.494	1.498	1.523	1.490
C1-C6	1.527	1.469	1.491	1.430
C3/C6-O	1.343	1.347	1.340	1.250
C4-O4	1.231	1.220	1.221	1.180
C2-C8	1.518	1.499	1.527	1.500
C4-C5	1.467	1.472	1.474	1.430
C5-C7	1.503	1.507	1.499	1.580
C=O⋯H	1.965	2.340	1.985	2.650
C5-C6	1.362	1.332	1.348	1.390
C6/C3-C3′	1.461	1.448	1.475	1.448
C2′-C3′	1.382	1.375	1.373	1.375
C2′-N	1.368	1.363	1.377	1.363
C8′-N	1.389	1.370	1.382	1.370

Obtained from Soriano-García et al., 1986 [40]; obtained from Noltemeyer et al., 1982 [41]; obtained from Enríquez et al., 1998 [42].