{HEAD ~ R4} is H, CN, C1 C18 alkyl, C1 C18 perfluoroalkyl, {TAIL ~ CH2 SO3 X}; or L SC ; wherein 
is
{ HEAD ~ R4 } is H , CN , C1 C18 alkyl , C1 C18 perfluoroalkyl , { TAIL ~ CH2 SO3 X } ; or L SC ; wherein
HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH