Synonyms: Heptanedioic acid, 4,4'-[[26,28-dihydroxy-5,17-bis[3,8,9,10-tetrahydro-1,3,8,10-tetraoxo-9-(1-pentylhexyl)anthra[2,1,9-def:6,5,10-d'e'f']diisoquinolin-2(1H)-yl]pentacyclo[19.3.1.13,7.19,13.115,19]octacosa-1(25),3,5,7(28),9,11,13(27),15,17,19(26),21,23-dodecaene-25,27-diyl]bis[oxy(1-oxo-4,1-butanediyl)imino]]bis[4-(2-carboxyethyl)-