Sulphur Trioxide-Pyridine Complex

248-968-5

c1ncccc1.S(=O)(=O)=O

UDYFLDICVHJSOY-UHFFFAOYSA-N

1S/C5H5N.O3S/c1-2-4-6-5-3-1;1-4(2)3/h1-5H;