prov:value
| - Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, L.L.P.20100075943 - 1-adamantylazetidin-2-one derivatives and drugs containing same: [wherein A ring represents C6-10 aryl group, 5- to 14-membered heteroaryl group, R1 is a hydrogen atom, halogen atom, C1-6 alkoxycarbonyl group, hydroxyl group, carboxyl group or carbamoyl group; R2 and R3 are the same or different and are a C1-6 alkyl group; R4,
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