“…1-D). Peaks a was ascertained as consisting of two components 5 and 5' having the Table 4 B: Peaks a (1) 5%, b (2) 6%, c (3) 51%, d (3') 38% C: Peaks a (1) 5%, b (2) 5%, c (3, 4) 55%, d (3') 19%, e (4') 16% D: Peaks a (5, 5') 7%, b (6, 6') 72%, c (10) 21% E: Peaks a (7, 7') 4%, b (1) 2%, c (2) 2%, d (3,8) 16%, e (8') 20%, f (4') 9%, g (10) 19%, h (9) 28% signal intensity ratio of 3:7. Each configuration of 5 and 5' can be determined by considering the steric compression effect of the bridged carbon C-7.…”