Patent ID: 8883965

Claim:
A compound having the formula (I): wherein: R 1 is H; and R 2 is (CH 2 ) m —X; or R 1 and R 2 in combination with the carbon atom to which they are attached together form an acyclic structure that comprises from 3 to 8 carbon atoms; m is selected from 0, 1, 2 and 3; n is selected from 0, 1, 2, 3 and 4; p is selected from 2, 3 and 4; when m is 0, 2 or 3, X is selected from C 3-8 -cycloalkyl and C 5-8 -cycloalkenyl; when m is 1, X is selected from C 3-8 -cycloalkyl, C 5-8 -cycloalkenyl, isopropyl and tert-butyl; said alicyclic structure, C 3-8 -cycloalkyl, and C 5-8 -cycloalkenyl, optionally have at least one alkyl, O-alkyl or hydroxyl substituent; and R 3 , R 4 , R 5 , R 6 , R 7 and R 8 are each independently selected from H, alkyl, OH, O-alkyl and OC(O)-alkyl; wherein each alkyl is selected from C 1-6 straight and C 4-8 branched chain alkyl groups and optionally has at least one hydroxyl substituent; or a pharmaceutically acceptable salt thereof.