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The crystal structure of strophanthidin, a cardioactive steroid, C23H32O6.1/2H2O

<h2>Acta Crystallographica Section B</h2><h3>Structural Crystallography and Crystal Chemistry</h3><h3>0567-7408</h3> <h2>research papers</h2> Volume 29 Part 9 Pages 1842-1848 September 1973 <h2>The crystal structure of strophanthidin, a cardioactive steroid, C 23 H 32 O 6 .1/2H 2 O</h2> R. D. Gilardi and J. L. Flippen Acta Cryst. (1973). B29, 1842 The Crystal Structure of Strophanthidin, a Cardioaetive Steroid, C23H3206.½ a20 BY RICHARD D. GILARDI AND JUDITH L. FLIPPEN Laboratory for the Structure of Matter, Naval Research Laboratory, Washington, D.C. 20390, U.S.A. (Received 4 December 1972; accepted 17 April 1973) Strophanthidin, C23H3206.½H20, is the aglycone of the strophanthus group of active cardiac glycosides which have a digitalis-like action on the heart. A partial structure was obtained using the symbolic addition procedure for non-centrosymmetric crystals and the complete structure was then developed using the tangent formula. The space group is P21 with a = 13.608 (8), b = 12.068 (8), c= 13-693 (8) ~, fl= 109.4 (2)° and Z=4. The X-ray analysis confirmed the expected configuration. As in other cardio- active steroids, the A/B and C/D ring junctions are cis. The two molecules in the asymmetric unit differ in the vicinity of the lactone rings, in such a way as to indicate a http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Acta Crystallographica Section B: Structural Crystallography and Crystal Chemistry International Union of Crystallography

The crystal structure of strophanthidin, a cardioactive steroid, C23H32O6.1/2H2O

Abstract

<h2>Acta Crystallographica Section B</h2><h3>Structural Crystallography and Crystal Chemistry</h3><h3>0567-7408</h3> <h2>research papers</h2> Volume 29 Part 9 Pages 1842-1848 September 1973 <h2>The crystal structure of strophanthidin, a cardioactive steroid, C 23 H 32 O 6 .1/2H 2 O</h2> R. D. Gilardi and J. L. Flippen Acta Cryst. (1973). B29, 1842 The Crystal Structure of Strophanthidin, a Cardioaetive Steroid, C23H3206.½ a20 BY RICHARD D. GILARDI AND JUDITH L. FLIPPEN Laboratory for the Structure of Matter, Naval Research Laboratory, Washington, D.C. 20390, U.S.A. (Received 4 December 1972; accepted 17 April 1973) Strophanthidin, C23H3206.½H20, is the aglycone of the strophanthus group of active cardiac glycosides which have a digitalis-like action on the heart. A partial structure was obtained using the symbolic addition procedure for non-centrosymmetric crystals and the complete structure was then developed using the tangent formula. The space group is P21 with a = 13.608 (8), b = 12.068 (8), c= 13-693 (8) ~, fl= 109.4 (2)° and Z=4. The X-ray analysis confirmed the expected configuration. As in other cardio- active steroids, the A/B and C/D ring junctions are cis. The two molecules in the asymmetric unit differ in the vicinity of the lactone rings, in such a way as to indicate a
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