Odinokov, V. N.; Ishmuratov, G. Yu.; Vakhidov, R. R.; Berg, A. A.; Muslukhov, R. R.; Tolstikov, G. A.
Chemistry of Natural Compounds, 1992 , vol. 28, # 2 p. 237 - 240
Khimiya Prirodnykh Soedinenii, 1992 , # 2 p. 272 - 276
sodium hydroxide in water; N,N-dimethyl-formamide
Pt-compd. dissolved in DMF with heating, addn. of the acid and aq. NaOH, heated in an unstoppered flask at 60°C for 20 h; cooled, filtered, addn. of ether;
