organic radical, {HEAD ~ M} is {TAIL ~ a metal} or metalloid selected from antimony, arsenic, phosphorus and boron, and d is an integer equal to from 4 6 L inclusive 
is
organic radical , { HEAD ~ M } is { TAIL ~ a metal } or metalloid selected from antimony , arsenic , phosphorus and boron , and d is an integer equal to from 4 6 L inclusive
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH