✍ Scribed by You-Bin Li; Wei-Hua Huang; Yu Xiang
No coin nor oath required. For personal study only.
Three new pteridines, hirudinoidines A – C (1–3, resp.), with novel structural features were isolated from Hirudo nipponica Whitman, and their structures were elucidated on the basis of extensive spectroscopic analyses and by comparison of their spectral data with those of related metabolites. The configuration of 1 was unequivocally confirmed by single‐crystal X‐ray diffraction (Fig. 2).
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## Abstract Three new alkaloids, longistylumphyllines A–C (1–3), together with the six known alkaloids deoxycalyciphylline B, deoxyisocalyciphylline B, methyl homosecodaphniphyllate, daphnicyclidin A, daphnicyclidin B, and daphnicyclidin F, were isolated from the stems and leaves of __Daphniphyllum
Debilosides A -C (1 -3), three new megastigmane glucosides, were isolated from the whole plant of Equisetum debile, together with the four known constituents blumenol A, corchoinoside C, sammangaoside A, and (3S,5R,6R,7E,9S)-9-[(b-D-glucopyranosyl)oxy]megastigm-7-ene-3,5,6-triol (4). Their structure
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