(untitled) - Gupton,J.T.; Krumpe,K.E.; Burnham,B.S.; Dwornik,K.A.; Petrich,S.A.; Du,D.X.; Bruce,M.A.; Vu,P.; Vargas,M.; Keertikar,K.M.; Hosein,K.N.; Jones,C.R.; et al. (Tetrahedron, 1998)