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xanthopterin
xanthopterin n.
Brit. 
/zanˈθɒptərɪn/
, /zanˈθɒptərɪn/U.S. /zænˈθɑptərən/
[ < German xanthopterin (Wieland & Schopf 1925, in Berichte der Deutsch. Chem. Ges. 58 2179): see pterin n.] Chemistry a yellow pterin present in the wings of some butterflies and moths and in the urine of mammals and forming leucopterin upon oxidation; 2-amino-4,6-dihydroxypterine, H2NC6HN4(OH)2./zænˈθɑptərən/ΘΚΠ
the world > matter > chemistry > organic chemistry > substances from animals or humans > [noun] > miscellaneous other substances
guanine1850
amyloid1872
chitosan1895
chondroitin1895
xanthopterin1926
lipocaic1936
xylulose1936
1926 Chem. Abstr. 20 902 The residue was rubbed up 4 times with H2O and centrifuged and the crude dirty yellow pasty pigment (xanthopterin (I)) extd. with 20‰ HCl and pptd. wth NaOAc.
1974 Encycl. Brit. Macropædia IV. 922/2 Xanthopterin occurs in human urine.
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