Photoresist Chemicals 9-[(2R,3R,4S)-3-hydroxy-4-methoxy-5-methylidene-oxolan-2-yl]-5-oxo-2,4,9-triazabicyclo[4.3.0]nona-3,7,10-triene-7-carbonitrile Cas：98890-72-3 Molecular Formula：C13H12N4O4