Crucial evidence for this conclusion was provided by the HMBC data, in which longrange correlations between the newly observed H-3″ proton and neighboring C-7, C-8, C-9, C-2″, and C-4″ carbons were observed clearly.
Crucial evidence for thisconclusion was provided by the HMBC data, in which longrangecorrelations between the newly observed H-3″ protonand neighboring C-7, C-8, C-9, C-2″, and C-4″ carbons wereobserved clearly.