79416-27-6 EINECS 279-151-1 Methyl 5-amino-4-oxovalerate hydrochloride Methyl aminolevulinate hydrochloride Methyl aminolevulinate hydrochloride [USAN] Methylaminolevulinate Metvix PDT Metvixia P-1202 Pentanoic acid, 5-amino-4-oxo-, methyl ester, hydrochloride