Extended Data Fig. 7: 1H NMR spectra for stability study of cytidine (C; 1) and uridine (U; 2) at 254 nm irradiation with bisulfite.
From: Selective prebiotic formation of RNA pyrimidine and DNA purine nucleosides
a, 1H NMR spectrum of the mixture of C (1), bisulfite and K4Fe(CN)6 in the dark. b, As in a, after 10 h of irradiation. c, 1H NMR spectrum of the mixture of U (2), bisulfite and K4Fe(CN)6 in the dark. d, As in c, after 10 h of irradiation. e, 1H NMR spectrum of the mixture of C (1), U (2), N9-thioanhydroadenosine (18), bisulfite and K4Fe(CN)6 in the dark. f, As in e, after 10 h of irradiation. f1, chemical shift (δ).
