参考文献

Fehr; Fehr, Olaf C.; Grapenthin; Grapenthin, Olaf; Kilian; Kilian, Joerg; Kirmse; Kirmse, Wolfgang; Steenken; Steenken, Steen Tetrahedron Letters, 1995 , vol. 36, # 33 p. 5887 - 5890