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Literature cited
M. E. Perel'son, Yu. N. Sheinker, and A. A. Savina, The Spectra and Structures of Coumarins, Chromones and Xanthones [in Russian], Moscow (1975), p. 91.
T. Noguchi and M. Kawagami, Chem. Ber.,72, 483 (1939).
Additional information
Ist I. M. Sechenov Moscow Medical Institute. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 644–645, September–October, 1983.