Substituted bisphenyl butanoic phosphonic acid derivatives as nep inhibitors

A compound of the formula (I):

• wherein:
• R1 is H;
• —C1-7alkyl or C6-10aryl;
• wherein alkyl is optionally substituted with one or more substituents independently selected from the group consisting of —O—C(O)—O—C3-7cycloalkyl, —O—C(O)—C3-7cycloalkyl, —O—C(O)—C6-10aryl, —O—C(O)—O—C6-10aryl, —O—C(O)—O—C1-7alkyl, —O—C(O)—C1-7alkyl, heteroaryl, heterocyclyl, —C(O)-heterocyclyl, —C(O)NH2, —C(O)NH—C1-7alkyl, and —C(O)N(C1-7alkyl)2;
• R2 is Cl, CH3 or F;
• R3 is H, F, Cl, CH3 or OCH3, or
• a pharmaceutically acceptable salt thereof.