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1H NMR spectra of six-porphyrin nanorings c-P6S–C7–10·T6 (CDCl3, 400 MHz, 298 K). Assignments (based on COSY and NOESY) are given for c-P6S–C7·T6. Dotted lines highlight the appearance of a different product of reduced symmetry in the 1H NMR spectrum of c-P6S–C8·T6. The low-symmetry species is the major product for c-P6S–C10·T6.
