4-(2,3,4,6-Tetraiodophenoxy)crotonic acid methyl ester 4-06-00-01089 (Beilstein Handbook Reference) 91058-69-4 BRN 3154925 CROTONIC ACID, 4-(2,3,4,6-TETRAIODOPHENOXY)-, METHYL ESTER gamma-(2,3,4,6-Tetrajodphenoxy) crotonsaeuremethyl ester [German]