✍ Scribed by Ning Li; Ji-Jun Chen; Jun Zhou
No coin nor oath required. For personal study only.
Four new phenolic compounds, named crassifogenin A (1), crassifogenin B (2), crassifoside A (3), and crassifoside B (4), were isolated from the EtOH extract of the rhizomes of Curculigo crassifolia, and based on the chemical transformation and modern spectroscopic experiments, including 2D‐NMR techniques (HMQC, HMBC, COSY, HMQC‐TOCSY, and NOE), their structures were elucidated as 2,5‐bis(3,4‐dihydroxyphenyl)furan‐3‐carbaldehyde (1), (3,4‐dihydroxyphenyl)(3,6,7‐trihydroxynaphthalen‐1‐yl)methanone (2), (3,4‐dihydroxyphenyl)[3‐(β‐D‐glucopyranosyloxy)‐6,7‐dihydroxynaphthalen‐1‐yl]methanone (3), and 1,2‐O‐{2‐(3,4‐dihydroxyphenyl)‐1‐[3‐(3,4‐dihydroxyphenyl)prop‐2‐ynyl]ethane‐1,2‐diyl}‐β‐D‐glucopyranose (4).
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