2 / 7,3 / 11,1 / 3,7 / 19

2 / 7,3 / 11,1 / 3,7 / 19

11/23
2/7,3/11,1/3=5/15 ,7/19 ,( )
The molecules are: 2, 3, 5, 7, 11. They are all prime numbers
The denominator is: 7, 11, 15, 19. They all differ by 4