  We investigate three possible pentaquark candidates, one of which contains a
single charm quark and the other two contain triple charm quarks in their
substructure. To this end we apply QCD sum rule method and take into account
both the positive and negative parity states corresponding to each possible
pentaquark channel having spin $3/2$ or $1/2$. Insisting on the importance of
identification of the members of pentaquark family we obtain their
spectroscopic parameters such as masses and residues. These parameters are the
main inputs in the searches for their electromagnetic, strong and weak
interactions.
