319492-47-2
25,27-bis[(hydroxycarbonyl)methoxy]calix[4]arene-crown-6
→
~38%
162209-40-7
25,27-bis(2-hydroxyethoxy)calix[4]arene-crown-6
142267-55-8
25,27-bis[(ethoxy-carbonyl)methoxy]-26,28-dihydroxycalix[4]arene