Assertion: known alkaloid | /r/HasProperty | anopterine
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Source sentences:
text: O. Subsequent fractionations of the organic layer using semipreparative phenyl HPLC (MeOH or MeCN/H 2 O/0.1% TFA) afforded the trifluoroacetate salts of the new alkaloids 6α-acetoxyanopterine (1), 4′-hydroxyanopterine (3), and 11α-benzoylanopterine (4), along with the known alkaloids anopterine (5), 7β-hydroxyanopterine (6), 7β,4′-dihydroxyanopterine (7), and 7β-hydroxy-11α-benzoylanopterine (8).