from The Century Dictionary.
- noun A bitter, alkaline, levorotatory alkaloid, C20H26O2N2.2H2O, found in cinchona bark, together with quinine, which it closely resembles in medicinal and general chemical properties. It crystallizes in needles, and, when dehydrated, melts at 172.3° C.
- noun A greenish resin, C20H26O3N2.H2O, formed by the reduction of quinine in acid solution. It softens at 35° C. and melts at 100° C.
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