. . . . . . . . . "Calcein" . . . "Calcein AM" . . . . "calcein" . . . "Calcein" . "Fluorexon" . . "2,2\u2032,2\u2032\u2032,2\u2032\u2032\u2032-[(3\u2032,6\u2032-Dihydroxy-3-oxo-3H-spiro[[2]benzofuran-1,9\u2032-xanthene]-2\u2032,7\u2032-diyl)bis(methylenenitrilo)]tetraacetic acid" . . . . . . . .