“…s, 5 arom. H) ;4,7 (AB,Jgem= 16,0,PhCH,); 1,84,1,55 (2s,Me2C(9)); 1,37 (s, Me2C (2) 3,6 (AB,Jgem = 16,0,PhCH,); 1,71,1,70,1,51,1,37 (4s,Me2C(2), Me2C (7) (C=C), 1602w, 1496m, 1454m, 1376w, 1358m, 1247m, 1217m, 1192w, 1177w, 1089m (br. ), 876m, 7013, 641m.…”