The molecule is an organosulfonate oxoanion resulting from the removal of a proton from both of the sulfo groups of a copper phthalocyanine-disulfonic acid. It is a conjugate base of a Luxol fast blue MBS (acid form).
copper;2,11,20,29,38,40-hexaza-37,39-diazanidanonacyclo[28.6.1.13,10.112,19.121,28.04,9.013,18.022,27.031,36]tetraconta-1(36),2,4(9),5,7,10(40),11,13,15,17,19,21(38),22(27),23,25,28,30,32,34-nonadecaene-5,23-disulfonate