The present invention relates to a method of treating pain using a compound of formula wherein R1, R2, R3 and R4 are as defined herein. The process relies on the use of polymerizable compositions comprised of a mixture of a dead polymer, a reactive plasticizer and, optionally, an initiator, which compositions are semi-solid-like prior to curing and induce low shrinkage upon curing as a result of their partially polymerized nature prior to processing. Then, the second address information is acquired from the command. The grease cap also includes at least one reduced thickness groove on a surface of the body of the constant velocity joint grease cap. Preferably, the methylalumoxane solution is present in a catalyst system also comprising a metallocene transition metal compound.