xanthopterin - Robuta Search

https://webbook.nist.gov/cgi/inchi?ID=U373089&Units=SI&Mask=2000 Xanthopterin, 3TMS derivative derivative https://webbook.nist.gov/cgi/inchi?ID=U373089&Units=CAL&Mask=2000&Type=LINEAR-RI-NON-POLAR-RAMP Xanthopterin, 3TMS derivative derivative