((2-hydroxy-4-oxo-6,7,8,9-tetrahydro-4H,5H-10-thia-1,4a-diazabenzo(a)azulene-3-carbonyl)amino)acetic acid
((2-hydroxy-4-oxo-6,7,8,9-tetrahydro-4h,5h-10-thia-1,4a-diazabenzo(a)azulene-3-carbonyl)amino)acetic acid