... Vol. 7 ... band at 1740 cm-l was a doublet in the derivative made from racemic 2-amino-I -butanol; nmr spwtrum (deuteriochloroform) 6 0.77 (m, 3, CI~J-CHZ), 1.30 ... Solvent was removed at room temperature by vacuum (using a rotatory evaporator) to about 1/4 the original volume. ...