Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... 1 H NMR (250 MHz, CDCl 3 ) δ 5.64 (m, 2H), 4.90 (m, 2H), 3.3 (d, J=3 Hz, 1H), 3.1-2.4 (m, ...