provided that at least one of R3, {HEAD ~ R6} or R8 is {TAIL ~ SO3 X}; and 
is
provided that at least one of R3 , { HEAD ~ R6 } or R8 is { TAIL ~ SO3 X } ; and
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH