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The charmoniumlike state $Y(4260)$ is described as predominantly a $D_1\bar{D}$ molecule in a coupled-channel quark model[Phys.\,Rev.\,D\,\textbf{96},\,114022\,(2017)]. The heavy quark spin symmetry(HQSS) thus implies the possible emergence of its heavy quark spin partnerswith molecular configuration as $D_1 \bar{D}^*$ and $D_2^* \bar{D}^*$ belowthese charmed mesons' thresholds. We analyze the probabilities of variousintermediate charmed meson loops for $J^{PC}=1^{--}$ exotic state $Y(4360)$ andfind that the channel $D_1 \bar{D}^*$ couples more strongly around its massregime, and the coupling behavior remains the same even if the mass of$Y(4360)$ is pushed closer to $D_1 \bar{D}^*$ threshold. This enlightens thatthe most favorable molecular scenario for the $Y(4360)$ could be $D_1\bar{D}^*$, and hence it can be interpreted as HQSS partner of the $Y(4260)$.We also find the strong coupling behavior of $D_2^* \bar{D}^*$ channel with the$\psi(4415)$, which makes it a good candidate for a dominant $D_2^* \bar{D}^*$molecule. We discuss the important decay patterns of these resonances todisentangle their long- and short-distance structures.

Heavy quark spin partners of the $Y(4260)$ in coupled-channel formalism