Patent ID: 8552161

Claim:
Compounds of formula II, wherein MBz denotes p-methoxybenzoyl, and R is selected from the group consisting of C 6-10 aryl-C 1-4 alkyl-, C 1-18 alkanoyl, C 3-18 alkenoyl, C 6-10 aryl-C(O)—, C 6-10 aryl-C 1-4 alkyl-C(O)—, wherein each of the groups can optionally be substituted by one or more substituents selected from the group consisting of C 1-6 alkyl, C 1-6 alkoxy, halogen, C 1-6 alkanoyl, C 1-6 alkenoyl, C 6-10 aryl-C(O)—, C 6-10 aryl, cyano, nitro and di(C 1-6 alkyl)amino groups.