Sulfur containing compounds in lubricant Additives:
ZDDP (an ester of Zn[(S2P(OR)2]2); Zinc, Sulfur, and phosphorus.
Spikes, H. "The History and Mechanisms of ZDDP". Tribology Letters. 17 (3): 469–489, (2004-10-01).
Calcium and Magnesium Sulfonates
Molybdenum Dithiocarbamate or MoDTC (recall that a MoDTC compound formula is
C4H8MoN4S8), or 4 carbon atoms, 8 hydrogen atoms, one or more moly atoms, 4 nitrogen atoms, and 8 sulfur atoms.
So any DTC compound is on the order of
C4H8XxN4S8, where Xx is the metallic element containing one or more of the metallic atoms to create this organo-metallic compound.