RARECHEM AL BO 1475 amino(5-ethoxy-2-methyl-2,3-dihydro-1-benzofuran-6-yl)acetic acid ecteinascidin 743 RARECHEM AL BO 2028 (2,3,5-TRIMETHOXY-4-METHYL-PHENYL)-ACETIC ACID RARECHEM AL BO 1490 (2-BUTYRYL-3,5,6-TRIMETHOXY-4-METHYL-PHENYL)-ACETIC ACID METHYL ESTER RARECHEM AL BO 1493 2-ETHYL-3-HYDROXY-5,6,8-TRIMETHOXY-7-METHYL-2,3-DIHYDRO-[1,4]NAPHTHOQUINONE (2,3,5-TRIMETHOXY-4-METHYL-PHENYL)-ACETIC ACID METHYL ESTER RARECHEM AL BO 1491 2,5-Dimethoxy-4-methylphenethylalcohol