  The $D^{(\ast)}\Xi_{cc}^{(\ast)}$ system and
$\bar{\Xi}_{cc}^{(\ast)}\Xi_{cc}^{(\ast)}$ system can be related to the
$D^{(\ast)}\bar{D}^{(\ast)}$ system via heavy anti-quark di-quark symmetry
(HADS). In this work, we employ a contact-range effective field theory to
systematically investigate the likely existence of molecules in these systems
in terms of the hypothesis that X(3872) is a $1^{++}$~$D\bar{D}^{\ast}$ bound
state in the isospin symmetry limit, with some of the unknown low energy
constants estimated using the light-meson saturation approximation. In the
meson-meson system, a $J^{PC}=2^{++}$~$\bar{D}^{\ast}D^{\ast}$ molecule
commonly referred to as $X(4013)$ is reproduced, which is the heavy quark spin
partner of $X(3872)$. In the meson-baryon system, we predict two triply charmed
pentaquark molecules, $J^{P}=1/2^{-}$~$D^{\ast}\Xi_{cc}$ and
$J^{P}=5/2^{-}$~$D^{\ast}\Xi_{cc}^{\ast}$. In the baryon-baryon system, there
exist seven di-baryon molecules, $J^{PC}=0^{-+}$~$\bar{\Xi}_{cc}\Xi_{cc}$,
$J^{PC}=1^{--}$~$\bar{\Xi}_{cc}\Xi_{cc}$,
$J^{PC}=1^{-+}$~$\bar{\Xi}_{cc}\Xi_{cc}^{\ast}$,
$J^{PC}=1^{--}$~$\bar{\Xi}_{cc}\Xi_{cc}^{\ast}$,
$J^{PC}=2^{-+}$~$\bar{\Xi}_{cc}\Xi_{cc}^{\ast}$,
$J^{PC}=2^{-+}$~$\bar{\Xi}_{cc}^{\ast}\Xi_{cc}^{\ast}$ and
$J^{PC}=3^{--}$~$\bar{\Xi}_{cc}^{\ast}\Xi_{cc}^{\ast}$. Among them, the
$J^{PC}=0^{-+}$~$\bar{\Xi}_{cc}\Xi_{cc}$ and/or
$J^{PC}=1^{--}$~$\bar{\Xi}_{cc}\Xi_{cc}$ molecules may contribute to the
$X(7200)$ state recently observed by the LHCb Collaboration, which implies that
$X(7200)$ can be related to $X(3872)$ via HADS. As a byproduct, with the heavy
quark flavor symmetry we also study likely existence of molecular states in the
$B^{(\ast)}\bar{B}^{(\ast)}$, $\bar{B}^{(\ast)}\Xi_{bb}^{(\ast)}$, and
$\bar{\Xi}_{bb}^{(\ast)}\Xi_{bb}^{(\ast)}$ systems.
