1. 3) Fleming, I., and Ghosh, S.K., The synthesis of nonactic acid. Its derivatives and nonactin itself. In “Studies in Natural Products Chemistry,” Vol. 18, ed. Rahman, A.u., Elsevier Science, Amsterdam, pp. 229-208 (1996).
2. 10) (+)-2c: a colorless oil, [α]21D+ 27 (c 0.090, CHCl3);1H-NMR (300 MHz, CDCl3) δ: 0.88-0.92 (3H, d, J=6.9 Hz, 10-H), 0.92-0.95 (3H, d, J=6.6 Hz, 9-Me), 1.16-1.21 (3H, d. J=7.1 Hz, 2-Me), 1.24-1.32 (1H, m), 1.60-1.78 (4H, m), 1.98-2.10 (2H, m), 2.46-2.56 (1H, quint, J=7.1 Hz, 2-H), 3.56-3.62 (1H, m, 8-H), 3.94-4.02 (1H, m, 3-H), 4,20-4.28 (1H, m, 6-H). (−)-2c: a colorless oil, [α]21D−27 (c 0.080, CHCl3).
3. 13) Macrotetrolide α(1j): a colorless oil, [α]24D±0°; (c=0.02, CHCl3);1H-NMR (500 MHz, CDCl3) δ: 0.86-0.91 (24H, m), 1.07-1.13 (12H, m), 1.40-2.08 (28H, m), 2.48 (1H, m), 2.55-2.67 (3H, m), 3.77-3.88 (3H, m), 3.95 (1H, m), 4.00-4.08 (3H, m), 4.12 (1H, m), 4.80-4.96 (4H, m). FABMS (m-nitrobenzyl alcohol+NaCl) m/z: 195 (monomeric fragment +H-H2O)+, 213 (monomeric fragment+H)+, 425 (dimeric fragment+H)+, 850 (M+H)+, 872 (M+Na)+. HR-FABMS m/z (M+H)+: calcd. for C48H81O12, 849.573; found, 849.573.