(3S,11aS)-3-(4-hydroxybenzyl)-2-[(1S)-1-{[2-(4-hydroxyphenyl)ethyl]carbamoyl}butyl]-4-oxo-3,6,11,11a-tetrahydro-4H-pyrazino[1,2-b]isoquinolin-2-ium-1-olate
(3s,11as)-3-(4-hydroxybenzyl)-2-[(1s)-1-{[2-(4-hydroxyphenyl)ethyl]carbamoyl}butyl]-4-oxo-3,6,11,11a-tetrahydro-4h-pyrazino[1,2-b]isoquinolin-2-ium-1-olate