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Antibiotics U 1200The First Total Synthesis and Structural Determination of (+)-BE-52440A -Synthetic compound (+)-(I) is identical to the natural product in all aspects including the optical rotation and is determined to be the dimer of kalafungin-type pyranonaphthoquinone. -(TATSUTA*, K.; SUZUKI, Y.; TORIUMI, T.; FURUYA, Y.; HOSOKAWA, S.; Tetrahedron Lett. 48 (2007) 45, 8018-8021; Dep. Appl. Chem., Sch. Sci. Eng., Waseda Univ., Shinjuku, Tokyo 169, Japan; Eng.) -Klein 08-210