Using structures for the parent compounds given in the text, write the structural formula for
a. 2,4-difluorofuran
b. 2-bromothiophene
c. 4-methoxyquinoline
d. 5-hydroxyisoquinoline
e. 2-isopropylimidazole
f. 3-pyridinecarboxylic acid
g. 3,4-diethylpyrrole
h. 5-hydroxyindole
i. 4-chloropyridinium bromide
j. 4-aminopyrimidine