2-Oxepanone homopolymer 1,2-ethanediyl ester 2-Oxepanone, homopolymer, ester with 1,2-ethanediol (2:1) Caprolactone homopolymer, diester with ethylene glycol Ethylene glycol-caprolactone copolymer Ethylene glycol-diethylene glycol-ε-caprolactone copolymer Ethylene glycol-initiated caprolactone homopolymer Poly(ε-caprolactone) diester with ethylene glycol Polycaprolactone diester with ethylene glycol ε-Caprolactone homopolymer diester with ethylene glycol ε-Caprolactone homopolymer ester with ethylene glycol ε-Caprolactone polymer ethylene glycol diester ε-Caprolactone-ethylene glycol copolymer