14,19-Dihydro-12,13-dihydroxy-20-norcrotalanan-11,15-dione 4-oxide (13-alpha,14-alpha)- 20-Norcrotalanan-11,15-dione, 14,19-dihydro-12,13-dihydroxy-, 4-oxide, (13-alpha,14-alpha)- 35337-98-5 Monocrotaline N-oxide