Table 1.

¹H NMR parameters for methylmycolate species

Spectra (500 MHz) were collected in deuterochloroform, and shift values are reported in ppm relative to internal CHCl₃ (δ7.26 ppm). Methylmycolic acids were purified as described. The listed peaks are in addition to the signals present in all samples of methylmycolic acids; δ0.86 (−(CH₂)_nCH₃, t, 6H), δ1.0–1.5 (−CH₂(CH₂)_nCH₂−, br s), δ1.56 (−CH₂CH(OH)−, m, 2H), δ1.70 (−CH₂CH(CO₂Me)−, m, 2H), δ2.41 (−CH(CO₂Me)−, m, 1H), δ3.63 (−CH(OH)−, br m, 1H), δ3.69 (−CO₂CH₃), s, 3H). α1 and α2 (21), as well as epoxy (22), assignments agree with those previously reported. t, Triplet; br, broad; s, singlet; m, multiplet; q, quartet; dd, doublet of doublets. 

^*R = H for compounds 4 and 6, and R = Me for compounds 5 and 7.