A compound of formula (I) wherein: R1 is optionally one or more halo or methyl groups; R2a and R2b are independently selected from the group consisting of: (i) F; (ii) H; (iii) Me; and (iv) CH2OH; R2c and R2d are independently selected from the group consisting of: (i) F; (ii) H; (iii) Me; and (iv) CH2OH; R3a and R3b are independently selected from H and Me; R4 is either H or Me; R5 is either H or Me; A is either (i) optionally substituted phenyl; (ii) optionally substituted naphthyl; or (iii) optionally substituted C5-12 heteroaryl.
化合物的结构式(I),其中:R1可以是一个或多个卤素或甲基基团;R2a和R2b分别选择自以下组合:(i)F;(ii)H;(iii)Me;和(iv)CH2OH;R2c和R2d分别选择自以下组合:(i)F;(ii)H;(iii)Me;和(iv)CH2OH;R3a和R3b分别选择自H和Me;R4可以是H或Me;R5可以是H或Me;A可以是(i)可选择取代的苯基;(ii)可选择取代的
萘基;或(iii)可选择取代的C5-12杂环基。