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