1,2,3-Propanetricarboxylic acid, 2-hydroxy-, 1-butyl 2,3-dioctadecyl ester 1-Butyl 2,3-dioctadecyl 2-hydroxypropane-1,2,3-tricarboxylate 67939-32-6 Butyl distearyl citrate EINECS 267-833-1