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. 2012 Nov 19;9(11):2605–2617. doi: 10.1002/cbdv.201200203

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Copyright © 2012 Verlag Helvetica Chimica Acta AG, Zürich

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Fig 4 — HPLC Analyses of a) Tc-NCC-1, b) ofZm-NCC-1, and c) ofa 1:2 mixture of the two NCCs. In the samples of Tc-NCC-1 and Zm-NCC-1, a second fraction (ca. 10%) occurred in addition to the main fraction (presumably, the minor fraction is the 13²-epimer of the main NCCs, due to epimerization at C(13²) of the β-keto ester functionality).