Photoresist Chemicals 3,8,10,12-Tetraoxa-9,11-distannahexadeca-5,14-dien-16-oicacid, 9,9,11,11-tetrabutyl-4,7,13-trioxo-, ethyl ester, (E,E)- (9CI) Cas：77900-69-7 Molecular Formula：C28H50 O9 Sn2