| http://www.w3.org/ns/prov#value | - wherein R1 is a monocyclic nitrogen-containing heterocyclic group having a deprotonatable hydrogen atom, R2 is an optionally esterified carboxyl group, and R3 is an optionally substituted lower alkyl group, or a salt thereof, (ii) a sugar alcohol, and (iii) a calcium antagonist;
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