gemini quaternary ammonium salt contained ester bond
4-(acrylic ethoxy ester) benzoic acid cholesterol ester
chiral phosphate-ester (phosphonate-ester)
chiral phosphate-ester(phosphonate-ester)
ester number ester value
ester value ester number
co-existing of lithium bond and hydrogen bond
connected bond， unblocked bond
lloyd’s average bond {standard form of average bond}
(2-methylacryloyloxy)ethyl ester of acrylic acid modified rosin
(methyl) acrylic acid and ester
(R)-4-cyano-3-hydroxybutyric acid ethyl ester
(R)-thiazolidine-2-thione-4-carboxylic ethyl ester
(S)-4-bromo-3-hydroxybutyric acid ester
[(2-lactoylamido) ethylamino] formic acid cholesterol ester
1’-ferrocenediformic acid dimethyl ester
10-(Carboxylethyl)-acridinium-9-carboxyl-phenyl-ester iodinate(CACPEI)