Chemistry wordoku #072 | Puzzle

Solve this ‘wordoku’ in the same way as a soduku with letters instead of numbers (each of the nine letters in each row, column and nine-square cell). Once solved, one of the overall diagonals can be rearranged into the name of a UK chemist best known for his work on heterocyclic chemistry.

This week’s letters are: A E G H L M R S T