Many naturally occurring compounds contain more than one functional group. Identify the...

Many naturally occurring compounds contain more than one functional group. Identify the functional groups in the following compounds:

(a) Penicillin G is a naturally occurring antibiotic.

(b) Dopamine is the neurotransmitter that is deficient in Parkinson’s disease.

(c) Capsaicin gives the fiery taste to chili peppers.

(d) Thyroxine is the principal thyroid hormone.

(e) Testosterone is a male sex hormone.