Occasionally in urinary tract infections, bacteria produce<unk>  phosphatase which splits<unk>  forming indigo and indirubin creating dramatic purple urine.<unk>  is also a product of indole metabolism, which is produced from tryptophan by intestinal flora, such as Escherichia coli.
Indoxyl sulfate
Cellulite
Orthosilicic acid
3-Indolepropionic acid
Diatrizoate
Hemoglobin
Fomite
Selenous acid