Table 1. 1H NMR spectra in DMSO-d6a.
aChemical shifts are indicated in p.p.m.
bIn the original paper (21) assignment for 3′ and 4′ protons of compound 3 were inverted, which we have corrected based on our assignment.
aChemical shifts are indicated in p.p.m.
bIn the original paper (21) assignment for 3′ and 4′ protons of compound 3 were inverted, which we have corrected based on our assignment.