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. 2013 Dec;19(12):1857–1863. doi: 10.1261/rna.042374.113

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© 2013 Turner et al.; Published by Cold Spring Harbor Laboratory Press for the RNA Society

This article is distributed exclusively by the RNA Society for the first 12 months after the full-issue publication date (see http://rnajournal.cshlp.org/site/misc/terms.xhtml). After 12 months, it is available under a Creative Commons License (Attribution-NonCommercial 3.0 Unported), as described at http://creativecommons.org/licenses/by-nc/3.0/.

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FIGURE 2. — Nuclear magnetic resonance analysis of 1m7 product. (A) Proton NMR in deuterated chloroform (CDCl₃). ¹H spectrum of 1m7, 500 MHz: s, 3.703, 3H; d, 8.062, J = 2.0 Hz; dd, 8.145, J = 2.0, 8.5 Hz, 1H; d, 8.396, J = 8.5 Hz, 1H. Internal solvent standard is at 7.27 ppm. (Inset) Structure shows the positions of the six H atoms in 1m7. The resonance at 1.62 is DHO, formed by deuterium exchange between the NMR solvent and a small amount of H₂O that enters the NMR solvent from the atmosphere, and thus does not arise from the product. (B) Carbon NMR in deuterated dimethyl sulfoxide (DMSO-d₆) ¹³C spectrum of 1m7, 125 MHz: 32.05, 109.81, 116.56, 117.48, 131.08, 143.00, 147.31, 152.35, 157.85 ppm. Internal solvent standard is at 38.95–39.88 ppm. (Inset) Structure shows the positions of the nine C atoms in 1m7. (s) Singlet; (d) doublet; (dd) doublet of doublets; (MHz) megahertz; (Hz) hertz; (J) coupling constant.