To sign "acetophenine," use the American Sign Language (ASL) signs for "a-c-e-t-o-p-h-e-n-i-n-e" in a fluid motion, combining the individual signs into one smooth movement.
To sign the word acetophenetidine, use a combination of handshapes and movements to represent each letter in the word, following the principles of American Sign Language (ASL).
"To sign acetonitrile, use the American Sign Language (ASL) fingerspelling technique by forming the letters A-C-E-T-O-N-I-T-R-I-L-E with your dominant hand."