1H,3H-Naphtho(1,8-cd)pyran-6-butanoic acid, gamma,1,3-trioxo-, (9alpha,11alpha,13E,15S)- 4-Methacryloxyethoxycarbonylpropionyl-1,8-naphthalic anhydride 94040-23-0 Mepna 184 Mepna-184