gemini quaternary ammonium salt contained ester bond

simple ester bond

co-existing of lithium bond and hydrogen 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-bromodecanoic-acid methyl ester

10-ester-homocamptothecin

11-benzylmercaptoundecanoic-N-hydroxysuccinimide ester

18β-Glycyrrhetinic acid methyl ester

2-(2-amino-4-thiazolyl)-2-methoxyiminoacetic thiobenzothiazole ester

2-[[[[(4-methoxy-6-methylthio-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]benzoic acid methyl ester

2-[[[[(4-methoxy-6-methylthio-2-pyrimidinyl)amino]carbonyl]amino]-sulfonyl]benzoic acid methyl ester

2-[2-(6-methoxynaphthalen-2-yl)morpholino]ethyl ester of indomethacin hydrochloride

2’-deoxyadenosine-5’-N-[(2S)-2-(3-benzoylphenyl)-1-oxopropyl]glycine ester