This test checks for labels of bicarbonate data nodes which can use Unicode.
For a bicarbonate data node the label HCO3- is used, but the chemically more correct Unicode version HCO₃⁻ can be used.
Open the pathway and replace the HCO3- label with a HCO₃⁻ label.
IMPORTANT: PathVisio 3.3 currently does not display Unicode characters correctly in the main view, but it can still be used to edit the labels. After uploading, the classic and the new website will display the Unicode label correctly.