... (C=0 Leucine); 17 1.2 (CO Ac); 16 7.4 (CO); 16 2.2 (C-3); 13 9.5 (CH=CCH3); 13 6 .1 (CH=C-NHAc); 13 2 .1 (C-l); 13 1.6 (C-5); 13 0.7 (C-6 ); 13 0 .1 23 (CH=C-CH3); 12 3 .1 (C-2); 11 7 .1 (C-45); 11 5.5 (CH=C-NHAc); ... Leucine); 16 8 .1 (C=0 Ac); 16 5 .1 (COOEt); 16 2.5 (CO-NH); 15 9.7 (C-3); 13 9 .1 (CH=C-CH3); 13 4.8 (CH=C-NHAc); 13 0.2 (C-l); 13 0.0 (CH=C-CH3); 12 9.6 (C-5); 12 7.3 (C-6 ); 12 1.6 (C-2); 11 4.7 (C-4); 11 4.4 (CH=C-NHAc); ... CH3-CO) 13 C-NMR (CDCI3, 12 5 MHz) ppm: 17 0 ,1 (-CO-NH); 16 7,0 (-COOH); 15 9,4 (C-6 ); 13 4,9 (C-2); 13 3,2 (C-4); 12 9,4 (C-l); 12 4,9 (-CH=C-NH); 12 2,2 (C-3); 11 5 ,1 (C-5); 11 4,8 (C-7); 55,3 (OCH3); 21, 2...