{HEAD ~ This invention} relates to {TAIL ~ a novel catalyst} comprising a compound of a transition metal of the group V of the Periodic Table, a process for producing a conjugated diene polymer using the catalyst, and polybutadiene having a specific structure 
relates to
{ HEAD ~ This invention } relates to { TAIL ~ a novel catalyst } comprising a compound of a transition metal of the group V of the Periodic Table , a process for producing a conjugated diene polymer using the catalyst , and polybutadiene having a specific structure
HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH