Wasn't sure about the lithium, but after searching around, it looks like it should be ok. The moly is the lube, which is normally a solid. The lithium, actually a soap but not a cleaner, is used as a carrier to make the moly behave as liquid, otherwise the moly would be dry.
MOLY EP LITHIUM GREASE is a smooth textured high melting point, water resistant lithium base grease fortified with molybdenum disulfide (moly) to reduce wear by maintaining lubrication under conditions of high friction and shock loads.
Lithium soap, often loosely referred to as "lithium grease" or "white lithium", is a soap that is a lithium derivative. Lithium soaps are primarily used as components of certain lubricant greases. ... The most useful of the non-detergent soaps are those based on lithium, as they are free of corrosive properties.
The soap is dispersed into the oil to form a stable, viscous gel that is called a grease. Grease made with lithium soap ("lithium grease") adheres particularly well to metal, is non-corrosive, may be used under heavy loads, and exhibits good temperature tolerance.
I'm just a googler, not a petro-chemist.
I used a high moly, extreme pressure grease, as found in grease gun cartridges. That was over 6000 miles ago, still good when I checked last winter.
More searching shows some manufacturers recommending moly-lithium for drive shaft splines.