... 1997 Pharmaceutical Society of Japan NIT—Electronic Library Service ... from AcOEt—hexane to aflbrd colorless prisms, mp 158—160°C. lH-NMR (CDC13) 5: 1.25—1.82(11H, m, 4-H, C(CH3)3), 202—220 (1H, m, 3-H), 225—240 (1H, m, 3—H), 241—259 (1H, m, Vol. 45, No. ...