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US08816086B2 Process for preparing cannabinoid receptor ligands 有权
制备大麻素受体配体的方法

Process for preparing cannabinoid receptor ligands
Abstract:
A process for the preparation of compounds of formula (I) or a salt thereof wherein X1, X2, X3, X4, Rx, u, R2, R1g, z, and A1 are as defined in the specification is disclosed.
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