The chemistry of oestrin

Abstract
Thirty-two percent of the oestrus-producing material in the ether extract of acidified urine was crystallized. This substance melted at 264-266[degree] and the molecular formula C18H24O3 was suggested for it. The substance was dextrorotatory (a)5461= +38. It is acid in nature and contains at least 3 OH groups. One of these is acidic and there is one hydroxyphenyl radical.

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