title: 3',6'-Bis(ethyl-amino)-2-[(2-hydroxy-ethyl)-amino]-2',7'-dimethylspiro-[isoindoline-1,9'-xanthen]-3-one.
abstract: In the title compound, C(28)H(32)N(4)O(3), the dihedral angle between the planes of the xanthene ring system and the spiro-lactam ring is 85.99 (3)°. Mol-ecules are linked by inter-molecular O-H⋯O and N-H⋯O hydrogen-bonding inter-actions.
authors.forename: Mao-Zhong
authors.initials: MZ
authors.lastname: Tian
authors.forename: Xiao-Jun
authors.initials: XJ
authors.lastname: Peng