1. Detailed microbiological and isolation studies will be published in J. Antibiotics (Tokyo).
2. MW, molecular weight; VPO, vapour pressure osmometry in ethyl acetate; MS, mass spectrum; MIC, minimum inhibitory concentration againstStaphylococcus aureus (mcg/ml); NMR, nuclear magnetic resonance spectrum in CDCl3 (σ (ppm)); IR, infrared spectrum (KBr, cm−1); UV, ultraviolet spectrum; TLC, thin layer chromatography (SiO2).
3. s=singlet,d=doublet;dd=double doublet;t=triplet;q=quartet;oct=octet;m=multiplet; J=coupling constant.
4. T. Watanabe, H. Nishida andK. Satake, Bull. chem. Soc., Japan34, 1285 (1961).
5. T. Watanabe, Bull. chem. Soc., Japan33, 1101 and 1105 (1960);34, 15 (1961).—S. Ōmura, H. Ogura andT. Hata; Tetrahedron Lett.1967, 609.—T. Hata, S. Ōmura, M. Katagiri, H. Ogura, K. Naya, J. Abe andT. Watanabe, Chem. Pharm. Bull.15, 358 (1967).—S. Ōmura, M. Katagiri, H. Ogura andT. Hata, Chem. Pharm. Bull.16, 1167 (1968).