1. T. Noda, T. Take, T. Watanabe andJ. Abe, Tetrahedron26, 1339 (1970).
2. We thank Dr.T. Noda for sending the IR-spectrum of compound VII and for a gift of bostrycin.
3. K. Randerath,Thin-layer Chromatography, 2nd edn. (Verlag Chemie, Weinheim 1966), p. 208.
4. Thanks are due to Dr.M. Takada, Toyo Jozo Co., Japan for providing the M 1154 strain ofBostrychonema alpestre and the original specimen.
5. We are grateful to Dr.W. Gams and Dr.R. A. Samson of our institute for examining the fungi.