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.
Another option is to assume that the 25th, 50th, and 75th were part of a normal distribution to return a percentile ranking (think z-scores). A z-score of 0 would be your 50th, whereas a z-score of .67 would be your 75th, and a z-score of -.67 would be your 25th percentiles. You could then, based on your assumption, determine how far away from the 50th a particular value is by using normsdist.