content_image/928463.jpg content_image/928461.jpg content_image/928460.jpg content_image/928456.jpg content_image/928455.jpg content_image/928454.jpg content_image/928464.jpg content_image/928462.jpg content_image/928459.jpg content_image/928458.jpg content_image/928457.jpg content_image/928453.jpg content_image/928452.jpg
[0215] It is preferable that the lactone structure has a repeating unit having a lactone structure represented by any one of Formulae (LCl-1) to (LCl-17). The lactone structure is preferably the lactone structure represented by Formula (LCl-1), (LCl-4), (LCl-5), or (LCl-8) and more preferably the lactone structure represented by Formula (LCl-4). 

<img src='content_image/928463.jpg'>

<img src='content_image/928461.jpg'>

<img src='content_image/928460.jpg'>

<img src='content_image/928456.jpg'>

<img src='content_image/928455.jpg'>

<img src='content_image/928454.jpg'>

LCl-1 

LCl-2 

LCl-3 

LCl-4 

LCl-5 

LCl-6 

LCl-7 

<img src='content_image/928464.jpg'>

<img src='content_image/928462.jpg'>

<img src='content_image/928459.jpg'>

<img src='content_image/928458.jpg'>

<img src='content_image/928457.jpg'>

<img src='content_image/928453.jpg'>

<img src='content_image/928452.jpg'>

-continued 

LCl-8 

LCl-9 

LCl-10 

LCl-11 

LCl-12 

LCl-13 

LCl-14 

