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CPMAS 13C NMR spectra of Mexican husk tomato (P. ixocarpa) cutin. (A) Cutin after enzymatic treatment (reference). (B–D) Insoluble cuticular material after different TFA treatments (0.01, 0.1 and 1.0 M), and (E) insoluble cuticular material after alkaline hydrolysis treatments. Besides the aliphatic and carbohydrate peaks assigned, epoxylated compounds were detected because of their signals at δ 56 and 64 ppm.
