Trimethylaminoxyd und andere Stickstoffbasen in Krebsmuskeln.

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Abstract
Trimethylamine oxide (as picrate) was regularly isolated from Homarus vulgaris, up to 0.3% from the tail muscle. Slight amts. appeared to occur in the river crawfish, demonstrated only indirectly by the increase in volatile bases after reduction of extract tests with stan-nous chloride and HC1; previously it had been found only in sea animals. Trimethylamine, probably from trimethylamine oxide, d-arginine, betain, and perhaps choline were also isolated from H. vulgaris. A base of the probable composition C7H7NO2, showing many of the characteristics of trigonelline, but with a lower melting point, was found; it is probably an isomer. It has been isolated from the lysin fraction of Area noae. A test on a "trigonelline silver chloride" isolated some years ago from Arbatia pustulosa showed it to have the same properties as this base from H. vulgaris and A. noae.

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