(S)-(-)-Verapamilic Acid

l--Cyano--(3,4-dimethoxyphenyl)--isopropylbutyric Acid

(S)-4-Cyano-4-(3,4-dimethoxyphenyl)-5-methylhexanoic Acid

(S)--Cyano-3,4-dimethoxy--(1-methylethyl)-benzenebutanoic Acid