[OH:1][C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][CH:11]=1)[C:8](=[O:12])[O:7][CH2:6][CH2:5]2.[O:13]1[CH2:17][CH2:16][CH2:15][C@H:14]1[CH2:18]OS(C)(=O)=O>>[O:13]1[CH2:17][CH2:16][CH2:15][C@H:14]1[CH2:18][O:1][C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][CH:11]=1)[C:8](=[O:12])[O:7][CH2:6][CH2:5]26-Hydroxy-isochroman-1-one was reacted with Methanesulfonic acid (S)-1-(tetrahydro-furan-2-yl)methyl ester by method K1. The product with the molecular weight of 248.28 (C14H28FN3O3) was obtained in this way; MS (ESI): 249 (M+H+).
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