Results Chemistry. 4'-(Hydroxymethyl)-4, 5'-dimethylangelicin (3), 4'-(methoxymethyl)-4, 5'~ ethylangelicin (4), and the hydrochloride of 4'-(aminomethyl)-4, 5'-dimethylangelicin (5) have been prepared from 2 according to the synthetic procedure of Isaacs et al. 12 The tritiated compounds 3-5 have been prepared by substituting, in an analogous way as for unlabeled compounds, hydroxymethyl, methoxymethyl, or aminomethyl groups on tritiated ...