poly(epsilon-caprolactone-co-1,4,8-trioxa(4.6)spiro-9-undecanone)-poly(ethylene glycol)-poly(epsilon-caprolactone-co-1,4,8-trioxa(4.6)spiro-9-undecanone)
poly(epsilon-caprolactone-co-1,4,8-trioxa(4.6)spiro-9-undecanone)-poly(ethylene glycol)-poly(epsilon-caprolactone-co-1,4,8-trioxa(4.6)spiro-9-undecanone)