parameters arc listed in Tables 2a and 2b. Observed and calculated structure €actors may be obtaincd in tabular form €rom one of the authors (G. R.).All calculations were performed at our local computing center on an II3f/370-155 computer using our own program system. We thank Prof H . Batzer and Dr ,J. Sinnreich for suggesting the problem and supplying the crystals, Prof R. Huber and Dr H . Fehlhantmer for helpful discussions and hints rcgartling the Faltmolckiil mcthocl, and H . R.
Das Aminodesoxyuzarigenin (Ic) wird aus dem Uzarigenon (Ia) über das Ketoxim (Ib) (Z‐ und E‐Form) und dessen Reduktion (arnalgamierte Al‐Späne) erhalten.
Aus Digitoxigenin (I) entsteht nach bekannten Methoden der Ester (II), der mit NH3 oder NaJ in Methyläthylketon in das Phosphorylderivat (III) übergeführt wird.
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