... u* [16]. Page 7. 2158 HELVETICA CHIMICA ACTA - Vol. 63, Fasc. 8 (1980) - Nr. 226 were added and the mixture was cooled to 0". The hygroscopic crystals, which were deposited after 12 h, were filtered off under argon and dried over PzO5. Yield 97.6 g (79%) of 6i. ...