https://www.selleckchem.com/pr....oducts/empagliflozin
One new bisesquiterpenoid, biepiasreorlid II (1), three new sesquiterpene lactones 8α-methoxy-epiasterolid (4), 3β-acetoxyl-8-epiasterolid (5), and 3β-acetoxyl-atractylenolide I (6), along with five known analogues (2-3 and 7-9), were obtained from rhizome of Atractylodes macrocephala Koidz. All structures were assigned on the basis of detailed spectroscopic analyses. The absolute configuration of 1 was established by the analysis of single-crystal X-ray diffraction with Ga Kα radiation, and 4-6 were elucidated by TDDFT-EC
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