Synonyms: 4-Sulfonic calix[4]arene hydrate 95%;AC1LD8IW;139553-70-1;pentacyclo[19.3.1.1~3,7~.1~9,13~.1~15,19~]octacosa-1(25),3,5,7(28),9,11,13(27),15,17,19(26),21,23-dodecaene-5,11,17,23-tetrasulfonic acid, 25,26,27,28-tetrahydroxy-, nonahydrate;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-5,11,17,23-tetrasulfonic acid, 25,26,27,28-tetrahydroxy-, nonahydrate (9CI)