Microbial conversion of deuterium-labelled TAK-637 ((aR,9S)-[10,10,11, 11-H
-2(4)]-7-[3,5-bis(trifluoromethyl)benzyl]-8,9,10,11-tetrahydro-9-methyl-5-(
4-methylphenyl)-7H-[1,4]diazocino[2,1-g][1,7]naphthyridine-6,13-dione, 1) w
as carried out using Streptomyces subrutilus IFO13388 to give a deuterium-l
abelled hydroxylated TAK-637 ((aR,9S)- [10,10,11,11-H-2(4)]-7-[3,5-bis(trif
luoromethyl)benzyl]-8,9,10,11-tetraliydro-9-methyl-5-(4-hydroxymethylphenyl
)-7H-[1.4]diazocino[2,1-g][1,7]naphthyridine-6,13-dione, 2) for use as an i
nternal standard in LC-MS studies. Copyright (C) 2001 John Wiley & Sons, Lt
d.