Russia-Iran partnership treaty to start new chapter in relations -- Pezeshkian - Russia-Iran treaty different from ones with DPRK, Belarus -- diplomat - Russia-Iran partnership treaty to let signatories resist US sanctions -- Iranian expert - Iran-Russia relations developing thanks to Putin's efforts -- official - Russian, Iranian presidents outline plan for further contacts -- Kremlin - Russian and Iranian leaders meet amid escalating Middle East conflict - Russia wants to bring cooperation with Iran to higher level -- Russian prime minister - Pezeshkian vows to establish deeper Russia-Iran ties - Relations between Iran, Russia to develop on permanent basis -- Iranian president - Friendly Russian-Iranian relations obtained additional impetus in past years -- Putin