anthrapurpurin
noun
an·thra·pur·pu·rin
| \ ˌan(t)thrəˈpərp(y)ərə̇n\
plural -s
Definition of anthrapurpurin
: an orange crystalline compound C14H5O2(OH)3 found in commercial synthetic alizarin and also made separately; 1,2,7-trihydroxy-anthraquinone
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