Novel compounds

A compound with the formula I:

• or a pharmaceutically acceptable salt thereof, wherein:
• R1b, R1c, R1d and R1e each independently represent hydrogen or an optionally substituted C1-C6 alkyl, or R1b is linked to R1c or R1a to form an optionally substituted cycloalkyl ring, or R1c is linked to R1d or R1f to form an optionally substituted cycloalkyl ring;
• R1a, R1f and R1g each independently represent hydrogen, fluorine, cyano, hydroxyl, amino, optionally substituted C1-C6 alkyl or optionally substituted C1-C6 alkoxy, or R1a is linked to R1b to form an optionally substituted cycloalkyl ring, or R1a or R1g is linked to R to form an optionally further substituted ring, or R1f is linked to R1e or R1g to form an optionally substituted cycloalkyl ring;
• R2 represents optionally substituted C1-C3 alkyl or together with R3 forms an optionally substituted 5 to 10 membered monocyclic or bicyclic ring, or R2 together with R1g or R1a forms an optionally further substituted 5 or 6 membered ring;
• R3 represents an optionally substituted 5 to 10 membered monocyclic or bicyclic heteroaryl or aryl ring or R3 together with R2 forms an optionally substituted 5 to 10 membered monocyclic or bicyclic ring;
• L represents a covalent bond or an optionally substituted C1-C3 alkylene.