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https://www.ncbi.nlm.nih.gov/Structure/pdb/1HX9 1HX9: CRYSTAL STRUCTURE OF TEAS W273S FORM 1 5-EPI-ARISTOLOCHENE SYNTHASE1-HYDROXY-3,7,11-TRIMETHYLDODECA-2,6,10-TRIENE PHOSPHONIC ACIDMAGNESIUM ION crystal structureteasform