4-((3′,6′-dihydroxy-3-oxospiro[isoindoline-1,9′-xanthen]-2-yl)amino)-N-methylbenzamide
Chemical Formula: C28H21N3O5
Molecular Weight: 479.4920
m/z: 479.1481 (100.0%), 480.1515 (30.3%), 481.1548 (4.4%), 480.1452 (1.1%), 481.1524 (1.0%)
Elemental Analysis: C, 70.14; H, 4.41; N, 8.76; O, 16.68