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13C-NMR (125 MHz) spectra of CT fractions F1, F2, F3, F4 and F5 from LLR in DMSO-d6; DMSO-d6, dimethyl-d6 sulfoxide. Identity of the structures: R1=R2=H, propelargonidin (PP); R1=OH, R2=H, procyanidin (PC); and R1=R2=OH, prodelphinidin (PD).
