... The latter organic layer was dried (Na2S04), filtered, and concentrated in vacuo. ... CDC13,400 MHz) 6 10.41 (s, lH), 8.13 (d, lH, J = 8.6 Hz), 7.71 (d, lH, J = 8.9 Hz ... is contained in libraries on microfiche, immediately follows this article in the microfilm version of the journal, and can ...