I've been wanting to do these nails for awhile and I think they turned out alright! I decided to choose amino acids as my molecules since they were fairly straightforward to draw and thanks to the standard amino acid abbreviation table, I was even able to spell out a little message :-)

If anyone was wondering, red dots represent

O or OH groups and blue dots NH or NH2 groups. For methyl groups, I left the ends empty.

This is my left hand: