4b contaminated with 2b (b: R=Me).

NMR spectra for compounds 4b contaminated with 2b NOTE: The file numberings for 6b relate to a now obsolete scheme and should be regarded as 2b. Comments within the spectra themselves should be similarly treated. To view the data using MestreNova, download and install an unlicensed version of the program from https://mestrelab.com/download/mnova/ and then download the .mnpub file corresponding to the data you wish to view. This file provides a license for the MestreNova program for that dataset only, exposing the full functionality of the program.