Crystal structure of (3 R,5a S,6 R,9 R,12 R,12a R)-3,6,9-tri-methyl-deca-hydro-12 H-3,12-ep-oxy[1,2]dioxepino[4,3- i]isochromen-10-yl 5-((3a S,4 S,6a R)-2-oxohexa-hydro-1 H-thieno[3,4- d]imidazol-4-yl)penta-noate

In the title biotin-conjugated di-hydro-artemisinin (DHA) derivative, C25H38N2O7S, the mol-ecule retains the essential endoperoxide bridge and links the C-10 position of DHA to the penta-noate chain of biotin via an ester bond. In the solid state, the tetra-hy... ...

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