1. For part 27, see C.H. Heathcock, K.T. Hug and L.A. Flippin, Tetrahedron Lett., in press.
2. C.H. Heathcock, M.C. Pirrung, S.D. Young, J.P. Hagen, E.T. Jarvi, U. Badertscher, H.-P. Märki and S.H. Montgomery^J. Am. Chem. Soc., in press.
3. Erythromycin. VII. The Structure of Cladinose1