Morphine was the first single-substance drug to be derived from a plant, in this case from the resin of the opium poppy (Papaver somniferum) by a German pharmacist named Setru â¦ rner, in 1803-1805. It was first sold commercially by Heinrich Merck in the 1820's.
1 To find percentiles outside of this range, use the PERCENTILE.INC function. The syntax on this function is exactly the same as for the PERCENTILE.EXC function.  If you will need this worksheet to run on versions of Excel prior to 2007, use PERCENTILE instead of PERCENTILE.EXC or PERCENTILE.INC.
There is no universally accepted definition of a percentile. Using the 65th percentile as an example, the 65th percentile can be defined as the lowest score that is greater than 65% of the scores. This is the way we defined it above and we will call this Definition 1..