He first treated `` ethylene iodide `` ( C2H4I2 ) with silver acetate and then hydrolyzed the resultant `` ethylene diacetate `` with potassium hydroxide .
PRON ADV VERB `` NOUN NOUN `` ( NOUN ) ADP NOUN NOUN CCONJ ADV VERB DET NOUN `` NOUN NOUN `` ADP NOUN ADV .