The subject product is called Neopentyl glycol propoxylate diacrylate (CAS # 84170-74-1). It is indicated to be used in UV paint for dilution and as an additive in UV inks and UV coatings. It is also known as 3-[2,2-Dimethyl-3-(3-prop-2-enoyloxypropoxy)propoxy]propyl Prop-2-enoate. The name is also abbreviated in your request as Neopentylglcol (PO)2 Diacrylate (CAS # 84170-74-1).
[1] Please importantly note that only the relevant portion of the related is displayed above. You may refer to the said customs ruling for the entire ruling explanation.
[1]. https://rulings.cbp.gov/ruling/N321686