<Tr> <Th> DrugBank </Th> <Td> <Ul> <Li> DB00140 </Li> </Ul> </Td> </Tr> <Ul> <Li> DB00140 </Li> </Ul> <Tr> <Th> ChemSpider </Th> <Td> <Ul> <Li> 431981 </Li> </Ul> </Td> </Tr> <Ul> <Li> 431981 </Li> </Ul>

Which of the following is a derivative of riboflavin