in the formula, {HEAD ~ R0} represents {TAIL ~ a hydrogen atom} or CH3 group, R represents a CH2 group, CH2CH2 group or single bond, X represents a number 0 5 , and R1 is a hydrogen atom or C1 to C20 organic group, 
represents
in the formula , { HEAD ~ R0 } represents { TAIL ~ a hydrogen atom } or CH3 group , R represents a CH2 group , CH2CH2 group or single bond , X represents a number 0 5 , and R1 is a hydrogen atom or C1 to C20 organic group ,
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD 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 OTH OTH