| abstract |
A compound of formula (Ia): ** Formula ** in which X is NCH3; Y and Z are selected from N or CH; R3 is N (R) 2 or NHR in which R is a C1 to C30 alkyl; R1 is a C1 to C30 alkyl, a C2 to C30 alkenyl or -OR, wherein R is a C1 to C30 alkyl; R5, R7 and R10 are selected from hydrogen, C1 to C30 alkyl, C2 to C30 alkenyl and -OR wherein R is C1 to C30 alkyl; and R2, R4, R6, R8, R9 and R11 are hydrogen; or a salt and / or tautomer thereof. |