1-(((3',6'-Bis(dimethylamino)-3-oxospiro(isobenzofuran-1(3H) 9'-(9H)xanthen)-6(or 7)yl)carbonyl)oxy)-2,5-pyrrolidinedione 122363-35-3 2,5-Pyrrolidinedione, 1-(((3',6'-bis(dimethylamino)-3-oxospiro(isobenzofuran-1(3H) 9'-(9H)xanthen)-6(or 7)yl)carbonyl)oxy)- Tetramethylrhodamine succinimidyl ester Tmrsie