L iving ▁people ▁Category : A th let es ▁( track ▁and ▁field ) ▁at ▁the ▁ 1 9 7 2 ▁Summer ▁Olympics ▁Category : Fil ip ino ▁female ▁spr inter s ▁Category : Fil ip ino ▁female ▁hur d lers ▁Category : O lymp ic ▁track ▁and ▁field ▁athlet es ▁of ▁the ▁Philippines ▁Category : Place ▁of ▁birth ▁missing ▁( l iving ▁people ) ▁Category : As ian ▁Games ▁medal ists ▁in ▁athlet ics ▁( track ▁and ▁field ) ▁Category : As ian ▁Games ▁bronze ▁medal ists ▁for ▁the ▁Philippines ▁Category : A th let es ▁( track ▁and ▁field ) ▁at ▁the ▁ 1 9 7 8 ▁Asian ▁Games ▁Category : Med al ists ▁at ▁the ▁ 1 9 7 8 ▁Asian ▁Games <0x0A> </s> ▁I so van ill in ▁is ▁a ▁phen ol ic ▁al de hy de , ▁an ▁organ ic ▁comp ound ▁and ▁is omer ▁of ▁van ill in . ▁ ▁It ▁is ▁a ▁select ive ▁in hib itor ▁of ▁al de hy de ▁ox id ase . ▁ ▁It ▁is ▁not ▁a ▁substr ate ▁of ▁that ▁en zym e , ▁and ▁is ▁met abol ized ▁by ▁al de hy de ▁de h ydro gen ase ▁into ▁is ovan ill ic ▁acid . ▁I so van ill in ▁can ▁be ▁used ▁as ▁a ▁prec ursor ▁in ▁the ▁chemical ▁total ▁synth esis ▁of ▁morph ine . ▁The ▁proposed ▁met abol ism ▁of ▁is ovan ill in ▁( and ▁van ill in ) ▁in ▁rat ▁has ▁been ▁described ▁in ▁literature