When “R1” and {TAIL ~ “R2}” are respectively a hydrogen atom, there are {HEAD ~ many advantages} in water solubility 
When “ R1 ” and { TAIL ~ “ R2 } ” are respectively a hydrogen atom , there are { HEAD ~ many advantages } in water solubility
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH