将猫薄荷中分离出的荆芥内酯与等物质的量的氢气进行加成，得到的二氢荆芥内酯是一种有效的驱虫剂，可用于商业生产．如图为二氢荆芥内酯的一种合成路线：

已知A（C₁₀H₁₆O）的结构中有一个五元环，核磁共振氢谱显示其侧链上有四个不同环境的氢，且峰面积比为1：2：3：3．

回答下列问题：

Gemma Burford

    Gemma was born in' 1978 in a quiet (安静的) village in England. Her mother worked in a library and her father worked in a hospital. When she was a student at Oxford University, she travelled to Tanzania and met her husband, Lesikar for the first time. They got married in 2003 and had their daughter, Lucia, two years later. Now Lucia studies in a small primary school, and Gemma and Lesikar also teach her at home.

"Judy Boehmer

    Adam is Judy's first child. She now has four sons, seven daughters and a pet (宠物) dog, Bosco. Judy and her husband, Larry, live in Atlanta, Georgia, but they also have a motorhome (野营车). The Boehmers are a circus (马戏团) family and all the children are performers (演员) at the circus. The- children don't go to school, but study at home. The family travels more than 40.000 kilometres a year for their work The first show of the Boehmers was at a park in Lowa in 1989, and they now perform all over America.