Word: pyrroles
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...Hans Fischer achieved his first international fame two years ago. After 17 years of quiet research in his laboratory at Munich, he announced that he had succeeded in synthesizing hematin, the red iron core which carries oxygen into the blood (TIME, Jan. 7, 1929). He used pyrrol, a constituent of the common cure-all known as bone oil, subjected the colorless liquid to a complicated chemical treatment to obtain his results. The synthetic product he called hematine. Or ganic chemists are now experimenting with the substance, using it upon animals to de termine how doctors may employ it to cure...
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