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