4-L-aminoethylglyoxaline (L-iminazolylethylamine) and other active principles of ergot / by George Barger and Henry Hallett Dale.
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4-L-aminoethylglyoxaline (L-iminazolylethylamine) and other active principles of ergot / by George Barger and Henry Hallett Dale. Credit: Wellcome Collection. In copyright