Page 1. SYNTHETIC COMMUNICATIONS, 17(3), 241-250 (1987) ... (runs 1, 5 and 6). Therefore points ii and iii provide information about the ... 2-Me), 1.65 (m, 2, CH2CH3), 2.62 (ABX, 2, J=16.8 and 2.3, 3-CH2), 3.68 (s, 3, OMe), 9.71 (dr 1, J=2-3,CHO). ...