Sorry to say this, still now I didn't hear about B8 Vitamin, but I have some knowledge regarding Vitamin-B. Here I am giving scientific names for Vitamin-B.
Vitamin B1 called as thiamine.
Vitamin B2 called as riboflavin.
Vitamin B3 called as niacin or niacinamide.
Vitamin B5 called as pantothenic acid.
Vitamin B6 called as pyridoxine, pyridoxal, or pyridoxamine.
Vitamin B7 called as biotin.
Vitamin B9 called as folic acid.
Vitamin B12 called as cobalamin; commonly cyanocobalamin in vitamin supplements.
Retinol is another name for vitamin A.
Another name for riboflavin is vitamin B2.
Menadione is another name for vitamin K.
what is another name for vitamin Iadine
vitamin B7 is the another name of biotin.
http://www.nutritionalsupplementscenter.com/info/HealthSupplement/inositol.html
Vitamin C SS Raju
retinol
Vitamin B1.
biotin
Vitamin B12
Calcium pantothenate