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NMR spectroscopic data for the forms of the two diastereomeric products
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nd, not determined.
Ratio of the two diastereomeric products seen in the NMR spectrum, this was calculated from the integrals of the peaks in the region 1.75–2.6 ppm (shown in Fig. S3).
Ring systems observed for the forms of the two diastereomeric products, which were determined from the coupling constants between the protons on C3 and C4 J/Hz H3-H.
