stromectol merck Ingredient UNII CAS InChI Key Phenylephrine bitartrate 27O3Q5ML57 17162 39 9 NHKOTKKHHYKARN NDAAPVSOSA N Phenylephrine hydrochloride 04JA59TNSJ 61 76 7 OCYSGIYOVXAGKQ FVGYRXGTSA N Phenylephrine tannate DU5ATO7HYP 1416 03 1 HXLHQWSMCJUVMM RVLWPPNGSA N Active Moieties