4-Sulfonic-calix[6]arene hydrate

4-sulfocalix[6]arene hydrate ; 4-sulfocalix[6]arene (contains ca.15% water) ; 4-sulfonic calix[6]arene ; 4-sulfonic-calix6üarene hydrate ; hexasulfo(hexahydroxy)calix[6]arene ; calix(6)arene-p-sulfonic acid ; hexahydroxycalix[6]arenehexasulfonic acid ; 4-sulfocalix[6]arene ; 4-sulphonic-calix[6]arene ; hexahydroxycalix[6]arenehexasulfonic acid hexasulfo(hexahydroxy)calix[6]arene