Carbonate derivatives of 14β-hydroxycodeine"viz., 14β-hydroxy-6-O-(methoxycarbonyl)codeine, 6-O-methoxycarbonyl-14β-(methoxycarbonyloxy)codeine, and 14β-acetoxy-6-O-methoxy-carbonylcodeine, potential substrates for ringC modification in morphinane (sic) alkaloids, were synthesized for the first time."Russian Chemical Bulletin. August 2008, Volume 57, Issue 8, pp 1773–1774. Date: 11 Aug 2009; I. V. Evsikova, S. K. Moiseev, P. V. Petrovskii, V. N. Kalinin. Published in Russian inIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 8, pp. 1739–1740