ChEBI: Isopyridoxal is a pyridinecarbaldehyde that is pyridine-5-carbaldehyde bearing methyl, hydroxy and hydroxymethyl substituents at positions 2, 3 and 4 respectively. It has a role as a metabolite. It is a hydroxymethylpyridine, a monohydroxypyridine, a member of methylpyridines and a pyridinecarbaldehyde.