Two group CX
#1,1diX at alcohol level
1,1 diX when both Group are different
Example related to 1,1 diX
1,2 diX at Alcohol level
1,2 diX at carbonyl level
1,2 diX involving FGI and FGA
1,3 diX at Alcohol level
1,3 diX at carbonyl level
1,3 diX involving FGI and FGA