Typically, {HEAD ~ both the isoparaffin and n paraffin synthetic fluids} contain less than about 1 weight percent sulfur, less than about 1 weight percent nitrogen, and {TAIL ~ less than about 1 weight percent oxygenated compounds} 
contain
Typically , { HEAD ~ both the isoparaffin and n paraffin synthetic fluids } contain less than about 1 weight percent sulfur , less than about 1 weight percent nitrogen , and { TAIL ~ less than about 1 weight percent oxygenated compounds }
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL