| CPC C07F 13/00 (2013.01) [C07B 2200/13 (2013.01)] | 12 Claims |
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1. A complex containing one or more betaine molecules, one or more transition metals, and one or more sulfate molecules in a ratio of 1:1:1, wherein the one or more transition metals each are coordinated with two oxygen atoms of a single one of the betaine molecules or with two oxygen atoms of two different ones of the one or more betaine molecules, wherein the transition metal is zinc and the complex is characterized by an x-ray diffractogram having, for Cu-Kα1 radiation at room temperature, powder x-ray diffraction peaks at 9.8, 11.7, 19.3, 21.1, 21.5, 22.4, 24.4, and 24.7 in degrees 2-theta, each with a standard deviation of +/−0.2 degrees 2-theta.
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