What's Wrong With This Stamp? Find The Design Error!

This stamp honoring Gerty Cori, who was awarded the Nobel Prize in Medicine in 1947,
will be issued March 6 with an error in the design.

What is it?

I'm only guessing here, but is there such a compound as OH or OPO3, or maybe some other error with the formula.

Steve

You got it! The structure of the molecule shown, glucose-1-phosphate, is drawn incorrectly. The bond should be drawn from the ring carbon atom to the first oxygen in the phosphate group OPO3^2-. The bond is drawn incorrectly to the second O. It is hard to see, but I think the negative charge sign (-) in the superscript was left out too. It looks like just a 2, it should be written 2- to indicate there are two negative charges on the phosphate group. Maybe there is a minus sign in front of the two, but that would not be the usual way of writing it.
Here is the correctly drawn structure (from RPI):

Here are all four of the American Scientist stamps coming out tomorrow:



Apparently there will be writing on the back of each stamp to explain the contributions each scientist made.
I met Linus Pauling when he came to give a talk at Oregon State University in the early Eighties.

I don't like the letters covering their foreheads. I think they should have scaled down the names a bit to prevent the overlap and the stamps would have a much cleaner look to them. And John Bardeen and Gerty Cori, look at the camera, please.

Well in any case, I'm glad to see them honoring great scientists.

Linus Pauling was the winner of two Nobel Prizes, one in Chemistry and one Peace Prize.
There was a special March 6th pictorial cancel for the stamp in Corvallis, Oregon,
where he studied chemistry at Oregon State University as an undergraduate.