ethyl 3,3-dibutyl-2,4,7-trioxo-11-[(2-oxo-1,3-dihydro-2-benzothiophene-1-carbonyl)amino]-1H-chromeno[3,2-h]quinoline-9-carboxylate 在
(6S)-1-decyl-6-(hydroxymethyl)-1,3-diazinan-2-one 作用下,
以120 mg的产率得到ethyl 3,3-dibutyl-2,4,7-trioxo-11-[[(1R,2S)-2-oxo-1,3-dihydro-2-benzothiophene-1-carbonyl]amino]-1H-chromeno[3,2-h]quinoline-9-carboxylate