You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-(hydroxymethyl)-2-methyl-4-[[8-methyl-5-[(E)-2-phenylethenyl]-3,4-dihydro-1H-pyrido[4,3-b]indol-2-yl]methyl]pyridin-3-ol is the IUPAC name of a molecule. Please give its molecular formula.
user
C28H29N3O2
assistant