ethyl 2-naphthalen-2-ylsulfonylacetate ethyl 2-(2-naphthylsulfonyl)acetate 2-(2-naphthylsulfonyl)acetic acid ethyl ester ethyl 2-naphthalen-2-ylsulfonylethanoate ZINC00617986 STK205578 MLS000063366 SMR000075077 ethyl (2-naphthylsulfonyl)acetate