Figure 1

Structures of hydroxybenzaldehyde and methylbenzaldehyde analogues. (a) Benzaldehyde; (b) 3-hydroxybenzaldehyde; (c) 4-hydroxybenzaldehyde; (d) 2,3-dihydroxybenzladehyde; (e) 2,4-dihydroxybenzladehyde; (f) 2,5-dihydroxybenzladehyde; (g) 2,3,4-trihydroxybenzladehyde; (h) 2,4,5-trihydroxybenzladehyde; (i) 3,4,5-trihydroxybenzladehyde; (j) 2-methylbenzaldehyde; (k) 3-methylbenzaldehyde; (l) 4-methylbenzaldehyde; (m) 2,3-dimethylbenzladehyde; (n) 2,4-dimethylbenzladehyde; (o) 2,5-dimethylbenzladehyde; (p) 2,4,5-trimethylbenzaldehyde.