I have working solution.
You need to download 1.02b\ds916\synology.img and convert it as follow:
VBoxManage convertfromraw --format VDI [filename].img [filename].vdi
After that add sata contoller, converted image an additional hdd with space > 10GB.
Network must be set as bridged and set Mac: 001132123456.
On boot stage you must chose first option(not ESX!). After that you can use find.synology.com and install file DSM_DS916+_15284.pat