article 4 unclassified drug 4 Molecular Structure 2 chemical structure 2 drug structure 2 drug synthesis 2 hydroxyl group 2 hydroxylation 2 withanolide 2 12 o ethyljaborosalactone 42 1 12 o methyljaborosalactone 38 1 2 hydroxy 5 methoxy 3 (3 methylbut 2 enyl)naphthalene 1,4 dione (5 methoxylapachol) 1 2 hydroxy 7 methoxynaphthalene 1,4 dione (2 hydroxy 7 methoxy 1,4 naphthoquinone 1 21 hydroxy 11,19 oxidopregn 4 ene 3,20 dione 1 21 hydroxy 6,19 oxidopregn 4 ene 3,20 dione 1 21-hydroxy-11,19-oxidopregn-4-ene-3,20-dione 1 21-hydroxy-6,19-oxidopregn-4-ene-3,20-dione 1 21-hydroxylation 1 3 hydroxy 6 methoxy 2 (3 methylbut 2 en 1 yl)naphthalene 1,4 dione (7 methoxylapachol) 1 3,4 dihydro 10 hydroxy 2,2 dimethyl 2h benzo[g]chromene 5,6 dione (10 hydroxy beta lapachone) 1 3,4 dihydro 10 methoxy 2,2 dimethyl 2h benzo[g]chromene 5,6 dione (10 methoxy beta lapachone) 1 3,4 dihydro 6 hydroxy 2,2 dimethyl 2h benzo[g]chromene 5,10 dione (6 hydroxy alpha lapachone) 1 3,4 dihydro 6 hydroxy 2,2 dimethyl 2h benzo[g]chromene 5,10 dione (6 methoxy alpha lapachone) 1 3,4 dihydro 7 hydroxy 2,2 dimethyl 2h benzo[g]chromene 5,6 dione (7 hydroxy beta lapachone) 1 3,4 dihydro 7 methoxy 2,2 dimethyl 2h benzo[h]chromene 5,6 dione (7 methoxy beta lapachone) 1 3,4 dihydro 8 hydroxy 2,2 dimethyl 2h benzo[h]chromene 5,6 dione (8 hydroxy beta lapachone) 1 3,4 dihydro 8 methoxy 2,2 dimethyl 2h benzo[g]chromene 5,10 dione (8 methoxy alpha lapachone) 1 3,4 dihydro 8 methoxy 2,2 dimethyl 2h benzo[h]chromene 5,6 dione (8 methoxy beta lapachone) 1 3,4 dihydro 9 hydroxy 2,2 dimethyl 2h benzo[g]chromene 5,10 dione (9 hydroxy alpha lapachone) 1 3,4,5,6 tetrahydro 2,2 dimethyl 5,6 dioxo 2h benzo[h]chromen 7 yl pivalate (7 pivaloyl beta lapachone) 1