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DJERASSI C, 1957, FESTSCHR A STOLL, P330
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DODDRELL DM, 1974, TETRAHEDRON LETT, P2381
[5]
HENSENS OD, UNPUBLISHED DATA
[6]
ITO S, 1967, TETRAHEDRON LETT, P591
[7]
ITO S, 1969, TETRAHEDRON LETT, P2905
[8]
KHONG PW, UNPUBLISHED DATA